偏差 in 30 Seconds
- 偏差 (piānchā) means deviation or difference from an expected or true value.
- It's used when results aren't exactly as planned or measured.
- Common in fields like science, statistics, and engineering.
- Think of it as a 'slip' or 'drift' from the correct path.
The word 偏差 (piānchā) is a versatile term in Chinese that describes a deviation, difference, or error from an expected or true value. Imagine you have a target, and 偏差 is how far away your actual result is from that target. It's not necessarily a mistake, but a measurable difference that needs to be accounted for.
- Core Meaning
- A discrepancy between a measured or observed value and a true or expected value.
- When It's Used
- It's frequently used in technical and scientific contexts such as data analysis, statistics, engineering, and research, where accuracy and precision are paramount. You'll also encounter it in fields like psychology and economics when discussing statistical variations or experimental results.
- Example Scenarios
- In science, if an experiment's result is slightly different from the predicted outcome, scientists might discuss the '偏差'. In manufacturing, the 偏差 in a product's dimensions could determine if it meets quality standards. Even in everyday life, if a GPS navigation deviates slightly from the optimal route, one might say there's a '偏差'.
这个实验结果与预期值存在一定的偏差。
Understanding 偏差 helps you grasp the nuances of measurements and results, especially in contexts where exactness is important. It’s about acknowledging that reality often doesn't perfectly match our models or expectations, and that’s okay as long as we can quantify and manage those differences.
Using 偏差 correctly involves understanding its role as a noun that signifies a deviation from a standard or expected value. It often appears in contexts related to measurements, data, or comparisons.
- Common Sentence Structures
- 1. [Subject] + 存在 (cúnzài) / 有 (yǒu) + [一定/显著/小的] + 偏差 (piānchā) + [between A and B / from C].
- 2. [Measurement/Result] + 的 + 偏差 (piānchā) + 是 (shì) + [value/percentage].
- 3. [Action] + 导致 (dǎozhì) / 引起 (yǐnqǐ) + 偏差 (piānchā).
- Illustrative Examples
- Example 1: The measurement has a slight deviation.
测量值存在微小的偏差 (cèliáng zhí cúnzài wēixiǎo piānchā). - Example 2: The deviation from the standard is 5%.
与标准的偏差是百分之五 (yǔ biāozhǔn de piānchā shì bǎifēn zhī wǔ). - Example 3: This error in calculation caused a significant deviation.
计算中的这个错误导致了显著的偏差 (jìsuàn zhōng de zhège cuòwù dǎozhìle xiǎnzhù de piānchā).
我们需要分析数据中的偏差，找出原因。
Mastering these sentence patterns will allow you to discuss deviations and discrepancies accurately in various contexts, from academic papers to technical reports.
You'll most frequently encounter 偏差 (piānchā) in professional and academic settings where precision and accuracy are critical. It's a staple in discussions about data, measurements, and performance.
- Scientific and Technical Fields
- In laboratories, research institutions, and engineering firms, scientists and engineers regularly use 偏差 to describe the difference between experimental results and theoretical predictions, or between manufactured parts and their design specifications. For instance, a physicist might discuss the 偏差 in a particle's trajectory, or an engineer might analyze the 偏差 in a bridge's load-bearing capacity.
- Data Analysis and Statistics
- Data analysts and statisticians use 偏差 to quantify how much individual data points or sample sets differ from the average or expected distribution. This is crucial for understanding trends, identifying outliers, and making reliable predictions. Discussions about 'standard deviation' (标准偏差 - biāozhǔn piānchā) are common here.
- Manufacturing and Quality Control
- In factories, quality control inspectors check for 偏差 in product dimensions, weight, or performance. If a product's measurements fall outside an acceptable range of 偏差, it might be rejected. Phrases like '公差范围内的偏差' (gōngchā fànwéi nèi de piānchā - deviation within tolerance) are often used.
- Economics and Finance
- Economists might talk about the 偏差 between actual economic growth and projected growth, or financial analysts might discuss the 偏差 in investment returns compared to market benchmarks.
今天的气温与往年同期相比，有显著的偏差。
While 偏差 (piānchā) is a standard term, learners might make a few common mistakes when using or understanding it.
- Confusing with General 'Difference'
- Mistake: Using 偏差 when a simple 'difference' (不同 - bùtóng or 差异 - chāyì) is meant.
Explanation: 偏差 specifically implies a deviation from a norm, standard, or expected value. While it is a type of difference, not all differences are 偏差. For example, the difference in opinion between two people isn't usually called 偏差, but the difference between a measured value and the true value is. - Overuse in Casual Conversation
- Mistake: Using 偏差 in everyday, non-technical conversations where simpler words would suffice.
Explanation: While technically correct, using 偏差 for minor, everyday discrepancies can sound overly formal or academic. For instance, if your train is five minutes late, you wouldn't typically say there's a '偏差' in the schedule; you'd just say it's late. - Ignoring the Context of 'Expected Value'
- Mistake: Not understanding what the 偏差 is relative to.
Explanation: 偏差 is always a deviation *from* something. Without context, the term loses its meaning. Is it a deviation from the mean, from a target, from a previous measurement, or from a theoretical model? Understanding this reference point is crucial for interpreting the significance of the 偏差. - Grammatical Errors
- Mistake: Incorrectly using 偏差 as a verb or adjective.
Explanation: 偏差 is primarily a noun. While it can be part of compound verbs or used in descriptive phrases, it doesn't function as a standalone verb like 'to deviate' or an adjective like 'deviant' in English. For example, you don't say '它偏差了' (tā piānchāle) to mean 'it deviated'; you would say '它偏离了' (tā piānlíle) or describe the result as having a 偏差.
这个结果与预期目标相比，存在较大偏差。
Understanding 偏差 (piānchā) is enhanced by comparing it with similar words and recognizing when alternatives are more appropriate.
- 偏差 (piānchā) vs. 差异 (chāyì)
- 偏差 (piānchā): Specifically refers to a deviation from a standard, norm, or expected value. It implies a departure from correctness or accuracy.
- 差异 (chāyì): A more general term for 'difference' or 'discrepancy' between two or more things. It doesn't necessarily imply a deviation from a standard, but rather a contrast or variation.
- Example:
- 实验结果与理论值之间存在偏差 (The experiment result has a deviation from the theoretical value). (Here, there's a standard: the theoretical value.)
- 这两款手机的性能有很大差异 (There's a big difference in the performance of these two phone models). (Here, we're just comparing two things.) - 偏差 (piānchā) vs. 误差 (wùchā)
- 偏差 (piānchā): A deviation from a norm or expected value. It can be positive or negative and may or may not be due to an error.
- 误差 (wùchā): Specifically refers to an 'error' or 'mistake' that leads to a deviation. It implies something went wrong.
- Example:
- 测量工具的偏差 (The deviation of the measuring tool - could be inherent inaccuracy).
- 操作失误导致的测量误差 (The measurement error caused by operational mistake). - 偏差 (piānchā) vs. 偏离 (piānlí)
- 偏差 (piānchā): Primarily a noun, referring to the state of deviation.
- 偏离 (piānlí): A verb, meaning 'to deviate', 'to depart from', or 'to stray'. It describes the action of moving away from a course or standard.
- Example:
- 航线偏差 (Route deviation - the noun describing the state).
- 飞机偏离了航线 (The plane deviated from the route - the verb describing the action).
我们不能把所有的小差异都看作是偏差。
How Formal Is It?
Fun Fact
The character 差 (chā) itself has an interesting etymology. The original form depicted a person walking with a limp or stumbling, symbolizing an error or a difference from a normal gait. This visual origin reinforces the idea of deviation from a standard.
Pronunciation Guide
- Pronouncing 'si' as 'see' instead of 'shuh' in American English.
- Incorrect stress placement, often emphasizing the first or last syllable.
- Not clearly distinguishing between the tones, especially for learners.
- Merging the syllables together too much, losing clarity.
- Pronouncing the 'a' at the end too strongly, making it sound like 'ah' instead of a softer schwa.
Difficulty Rating
The word itself is straightforward, but understanding its nuances requires context. In technical texts, it can be challenging due to specialized vocabulary surrounding it. In general texts, it's easier to grasp.
Learners might struggle with choosing the correct synonym (e.g., 偏差 vs. 差异 vs. 误差) and using it in precise technical or academic contexts. Overuse in informal settings is also a potential pitfall.
Pronunciation can be a hurdle for some learners. Using it naturally in conversation requires understanding its appropriate register and context.
Recognizing 偏差 in spoken language, especially in fast-paced or technical discussions, can be difficult. Distinguishing it from similar-sounding words or similar concepts requires good comprehension skills.
What to Learn Next
Prerequisites
Learn Next
Advanced
Grammar to Know
Using adjectives to describe the degree of 偏差 (e.g., 显著, 微小, 大, 小).
结果与预期值存在显著的偏差。
Using verbs like 存在 (cúnzài) or 有 (yǒu) with 偏差.
数据存在一些偏差。
Using 偏差 as the object of verbs like 减小 (jiǎnxiǎo), 控制 (kòngzhì), 分析 (fēnxī).
我们需要分析这些偏差。
Using prepositions like 从 (cóng) or 与 (yǔ) to indicate what the deviation is from.
与标准值从此偏差。
The structure [Noun] + 的 + 偏差.
这个测量的偏差是多少？
Examples by Level
这个颜色和图片有一点偏差。
This color has a little difference from the picture.
Here, 偏差 is used loosely to mean a slight difference, common in simplified A2 contexts.
我的身高和朋友的比，有一点偏差。
My height compared to my friend's has a little difference.
Similar to the previous example, 偏差 is used for a simple, observable difference.
今天的温度和昨天的偏差不大。
The difference in temperature today compared to yesterday is not big.
Emphasizes a small difference between two comparable values.
这个蛋糕的味道和我想的不太一样，有点偏差。
The taste of this cake is not quite the same as I thought, it has a little deviation.
Refers to a difference from one's expectation.
我的手表走快了，和标准时间有偏差。
My watch is fast, it has a deviation from the standard time.
Introduces the idea of a standard or reference point.
地图上的这条路和实际的路有一点偏差。
This road on the map has a small deviation from the actual road.
Illustrates a discrepancy between representation and reality.
我画的圆形和老师教的不一样，有一个偏差。
The circle I drew is not the same as the teacher taught, there is a deviation.
Relates to a difference from a taught or ideal form.
这个玩具的颜色和包装盒上的偏差很大。
The deviation in the color of this toy compared to the box is large.
Highlights a noticeable difference from a given reference.
这个测量的结果与实际值存在一定的偏差。
The result of this measurement has a certain deviation from the actual value.
Introduces the concept of 'actual value' as a reference point for deviation.
我们必须考虑数据中的偏差，才能做出准确的分析。
We must consider the deviations in the data to make an accurate analysis.
Emphasizes the importance of accounting for deviations in analysis.
报告中的数字和我们之前讨论的数字有偏差。
The numbers in the report have a deviation from the numbers we discussed earlier.
Highlights a discrepancy between different sources or discussions.
由于天气原因，飞机的起飞时间出现了偏差。
Due to weather reasons, there was a deviation in the plane's departure time.
Shows a deviation from a planned schedule due to external factors.
这个预测模型的偏差很小，说明它比较准确。
The deviation of this prediction model is very small, indicating it is quite accurate.
Links small deviation to accuracy.
生产线上产品的尺寸偏差需要控制在一定范围内。
The deviation in product size on the production line needs to be controlled within a certain range.
Introduces the concept of controlling deviation within acceptable limits.
他的说法和事实有偏差，我们不能全信。
His statement has a deviation from the facts, we cannot believe it all.
Applies deviation to statements or claims versus reality.
这个计划的执行情况与预期目标存在偏差。
The execution of this plan has a deviation from the expected goals.
Relates deviation to project goals and execution.
统计数据显示，该地区的人均收入与全国平均水平存在显著偏差。
Statistical data shows that the per capita income in this region has a significant deviation from the national average.
Uses '显著' (significant) to describe the magnitude of deviation in a statistical context.
为了减小测量偏差，我们采用了更精确的仪器。
To reduce measurement deviation, we adopted more precise instruments.
Discusses methods to minimize deviation in scientific measurements.
心理学研究表明，某些认知偏差会影响人们的决策。
Psychological research indicates that certain cognitive biases can affect people's decision-making.
Introduces 偏差 in the context of psychology, often translated as 'bias'.
工程师们正在努力分析导致产品偏差的根本原因。
Engineers are working hard to analyze the root cause of the product deviation.
Focuses on root cause analysis of deviations in engineering.
股票市场的实际表现与模型预测存在较大偏差。
The actual performance of the stock market has a large deviation from the model's prediction.
Applies deviation to financial market predictions.
我们不能仅仅因为存在偏差就否定整个研究的价值。
We cannot negate the value of the entire research simply because there are deviations.
Discusses how to interpret research findings in the presence of deviations.
语言学习中，语法偏差是常见的现象。
In language learning, grammatical deviations are common phenomena.
Applies deviation to language and grammar, often referring to non-standard usage.
评估一个项目的成功与否，需要考虑其结果与目标的偏差。
To evaluate the success of a project, one needs to consider the deviation of its outcome from the goals.
Focuses on evaluating project success based on deviations from goals.
该模型的预测精度受到系统性偏差的严重影响。
The prediction accuracy of this model is severely affected by systematic bias.
Uses '系统性偏差' (systematic bias/deviation) which implies a non-random, consistent error.
在进行大规模调查时，抽样偏差是影响结果可靠性的关键因素。
When conducting large-scale surveys, sampling bias is a key factor affecting the reliability of the results.
Focuses on '抽样偏差' (sampling bias), a critical concept in statistics and research methodology.
艺术评论家们对这位画家的作品风格偏差的解读不一。
Art critics have differing interpretations of the stylistic deviations in this painter's work.
Applies 偏差 metaphorically to stylistic departures or unconventional elements in art.
这种材料在高温下的热膨胀偏差需要被精确计算。
The thermal expansion deviation of this material at high temperatures needs to be precisely calculated.
Specific technical application in materials science regarding thermal expansion.
社会学研究关注的是个体行为与社会规范之间的偏差。
Sociological research focuses on the deviation between individual behavior and social norms.
Connects 偏差 to sociological concepts like deviance from norms.
我们必须警惕那些试图通过操纵数据来掩盖偏差的行为。
We must be wary of actions that attempt to conceal deviations by manipulating data.
Highlights the ethical implications of managing or concealing deviations.
在量子力学中，粒子的行为经常表现出与经典物理学预测的偏差。
In quantum mechanics, particle behavior often exhibits deviations from classical physics predictions.
Example from a highly specialized scientific field (quantum mechanics).
评估一项政策的有效性，需要对其预期效果与实际结果的偏差进行量化分析。
Evaluating the effectiveness of a policy requires a quantitative analysis of the deviation between its expected effects and actual outcomes.
Emphasizes quantitative analysis of deviations in policy evaluation.
该算法在处理非线性数据时，其预测值的偏差呈现出复杂的分布模式。
When this algorithm processes non-linear data, the deviation of its predicted values exhibits complex distribution patterns.
Advanced statistical terminology, 'complex distribution patterns' of deviation.
文化相对主义的视角认为，‘偏差’本身就是一个文化建构的概念。
From the perspective of cultural relativism, 'deviation' itself is a culturally constructed concept.
Philosophical and anthropological application, questioning the universality of 'deviation'.
在信号处理领域，我们需要区分信号本身的偏差和噪声的干扰。
In signal processing, we need to distinguish between the signal's intrinsic deviation and noise interference.
Technical distinction in signal processing between inherent signal characteristics and external interference.
经济学中的‘理性选择理论’常常面临行为经济学对其偏差的挑战。
The 'rational choice theory' in economics often faces challenges from behavioral economics regarding its deviations.
Interdisciplinary challenge, contrasting theoretical models with observed human behavior.
语言学中的‘语言变异’研究，实质上就是对标准语语法的偏差进行系统性考察。
The study of 'language variation' in linguistics is essentially a systematic examination of deviations from standard grammar.
Linguistic perspective on variation as deviation from a standard.
鉴于历史记录的偏差，我们对事件的重建需要多方考证。
Given the deviations in historical records, our reconstruction of events requires corroboration from multiple sources.
Discusses historical interpretation in light of potential biases or inaccuracies in records.
在进行基因组学分析时，必须考虑测序偏差对结果解读的潜在影响。
When performing genomic analysis, one must consider the potential impact of sequencing deviations on result interpretation.
Highly specific technical term in genomics.
现代哲学对‘真实’概念的解构，挑战了传统哲学中关于客观真理的偏差。
The deconstruction of the concept of 'truth' in modern philosophy challenges the deviations from objective truth in traditional philosophy.
Abstract philosophical discussion about the nature of truth and its perceived deviations.
Common Collocations
Common Phrases
— Deviation analysis; the process of examining deviations.
我们需要对报告中的偏差分析结果进行讨论。
Often Confused With
差异 is a general term for difference. 偏差 specifically refers to a deviation from a norm or expected value. All 偏差 are 差异, but not all 差异 are 偏差.
误差 means 'error' or 'mistake'. It is often the cause of 偏差, but 偏差 itself is the resulting difference from the standard, not necessarily the error itself.
偏离 is a verb meaning 'to deviate'. 偏差 is the noun describing the state of being deviated or the deviation itself.
Idioms & Expressions
— Not even a hair's breadth of error; perfectly accurate. This is an idiomatic way to describe the absence of deviation.
这项精密测量要求做到毫厘不爽，不允许有任何偏差。
Formal— A tiny difference at the start can lead to a huge error later. This idiom highlights the consequence of even small deviations.
在科学实验中，初期偏差可能导致最终结果差之毫厘，谬以千里。
Formal— Drawn by horses going south and north; acting in opposite directions; completely contrary. While not directly using 偏差, it describes a situation of extreme deviation from a common goal or direction.
你们的目标南辕北辙，这样下去肯定会产生巨大的偏差。
Formal— To deviate from the original intention or purpose. This describes a deviation from a guiding principle or original plan.
随着项目的发展，许多决策开始背离初衷，产生了意想不到的偏差。
Formal— To depart from orthodox doctrines; to be heretical. This idiom describes a significant deviation from established norms, beliefs, or traditions.
他的思想过于离经叛道，与主流观点偏差太大。
Formal— The name or reputation does not match the reality; undeserved fame. This implies a deviation between what is claimed and what is true.
这家餐厅的宣传与实际口味存在偏差，实在是名不副实。
General— To disappear without a trace; to vanish mysteriously. While not directly about numerical deviation, it implies an unexpected and unexplained departure from a normal state.
昨天还在的报告，今天却不翼而飞了，这其中一定有偏差。
General— To deviate from orbit; to go off track. Used literally for celestial bodies or metaphorically for plans or behavior.
如果卫星偏离轨道，将产生无法估量的偏差。
Technical/Metaphorical— To miss by a hair's breadth; a slight error. Similar to '差之毫厘，谬以千里', emphasizing the smallness of the initial deviation.
这项任务要求极高的精度，任何失之毫厘的偏差都可能导致失败。
Formal— Untimely; inappropriate for the time. This implies a deviation from what is currently suitable or expected.
他的提议不合时宜，与当前形势存在明显偏差。
GeneralEasily Confused
Both words describe a difference between things.
偏差 implies a deviation from a specific standard, norm, or expected value. It's often quantitative and technical. 差异 is a broader term for any difference, comparison, or contrast between two or more items, without necessarily implying a deviation from a benchmark.
这两组数据的<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>差异</mark>不大，但与理论值的<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>偏差</mark>却很显著。
Both relate to inaccuracies or departures from correctness.
误差 refers to an error or mistake that causes a deviation. It's the source of the problem. 偏差 is the resulting difference or departure from the true or expected value. You can have 偏差 without necessarily having a clear 'error' (e.g., natural variation), but 误差 typically leads to 偏差.
由于仪器<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>误差</mark>，测量结果出现了<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>偏差</mark>。
Both involve the concept of moving away from something.
偏离 is a verb meaning 'to deviate' or 'to depart'. It describes the action of moving away from a path, standard, or norm. 偏差 is a noun that refers to the state of deviation itself, the amount of difference, or the discrepancy.
飞机<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>偏离</mark>了航线，导致了航行<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>偏差</mark>。
Both indicate a lack of matching or agreement.
不符 is a more general term meaning 'does not match' or 'is inconsistent with'. It's often used in everyday contexts for visual or descriptive mismatches. 偏差 is more technical and quantitative, referring to a specific degree of difference from a defined standard or expectation.
这个产品的颜色<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>不符</mark>要求，存在很大的<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>偏差</mark>。
Both relate to inaccuracy.
失准 specifically means 'out of calibration', 'inaccurate', or 'off-target', usually applied to instruments or measurements. It implies that the measuring tool itself is not providing correct readings, leading to 偏差. 偏差 is the result of this失准 (or other factors).
由于测量仪<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>失准</mark>，读数出现了<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>偏差</mark>。
Sentence Patterns
[Subject] + 存在/有 + [Adjective] + 偏差
这个结果<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>存在</mark>一些<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>偏差</mark>。
[Noun] + 的 + 偏差
测量<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>的</mark> <mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>偏差</mark>是多少？
[Cause] + 导致/引起 + 偏差
操作失误<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>导致</mark>了<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>偏差</mark>。
与 + [Reference] + 存在/有 + 偏差
与标准值<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>有</mark> <mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>偏差</mark>。
[Adjective] + 偏差 + 在 + [Range]
<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>系统性</mark> <mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>偏差</mark> <mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>在</mark>可接受范围内。
对 + [Thing] + 进行 + 偏差分析
对数据<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>进行</mark> <mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>偏差分析</mark>。
偏差 + [Verb Phrase indicating complexity or distribution]
<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>偏差</mark>呈现出复杂的分布模式。
将 + [Deviation] + 与 + [Standard] + 进行比较
将测量<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>偏差</mark>与理论值<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>进行比较</mark>。
Word Family
Nouns
Verbs
Adjectives
Related
How to Use It
High, especially in specific domains.
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Using 偏差 for any kind of difference.
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Use 差异 (chāyì) for general differences, and 偏差 when there's a deviation from a standard or expected value.
偏差 specifically implies a departure from a norm or target. If two things are just different, like two colors, 差异 is better. If one color is supposed to match a standard but doesn't, that's a 偏差.
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Confusing 偏差 (noun) with 偏离 (verb).
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Use 偏离 (piānlí) for the action of deviating, and 偏差 (piānchā) for the result or state of deviation.
For example, 'The plane deviated from its route' is 飞机<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>偏离</mark>了航线 (piānlí le hángxiàn). The resulting difference in position is 航线<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>偏差</mark> (hángxiàn piānchā).
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Using 偏差 when 误差 (wùchā - error) is more appropriate.
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Use 误差 when referring to a mistake or fault that caused the deviation. Use 偏差 for the deviation itself.
An 'error' (误差) can *cause* a 'deviation' (偏差). For instance, 'measurement error caused a deviation' is 测量<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>误差</mark>导致了结果<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>偏差</mark>.
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Using 偏差 in casual conversation as a simple 'difference'.
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In informal contexts, use simpler words like '不一样' (bù yīyàng - different) or '差一点' (chà yīdiǎn - a little off).
While technically correct, using 偏差 in casual chat can sound overly formal or academic. For example, saying 'This shirt has a 偏差 from the picture' is less natural than 'This shirt is different from the picture' (这件衣服和图片不一样).
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Not specifying what the deviation is from.
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Always clarify the reference point for the deviation.
Saying 'There is a deviation' is incomplete. It should be 'There is a deviation *from the standard*' (与标准存在<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>偏差</mark>) or 'There is a deviation *from the prediction*' (与预测存在<mark class='bg-emerald-200 dark:bg-emerald-800 px-0.5 rounded'>偏差</mark>).
Tips
Mastering the Sounds
Pay close attention to the stress on the second syllable ('an'). Practice the 's' sound in Mandarin Chinese, which is often softer than in English. For US English speakers, ensure the 'si' is pronounced as 'shuh' rather than 'see'.
Distinguishing Similar Words
Actively practice differentiating 偏差 from 差异 (general difference), 误差 (error), and 偏离 (to deviate). Understanding these distinctions will greatly improve your accuracy.
Apply in Technical Fields
When you encounter technical documents, scientific papers, or engineering reports, actively look for the word 偏差. This will reinforce its meaning and usage in its most common and precise contexts.
Visual Association
Use the visual association of a slightly bent ruler or a target with scattered arrows. This image helps to solidify the core meaning of deviation from a straight or central point.
Sentence Building
Try creating your own sentences using 偏差 in different contexts. Start with simple sentences and gradually move to more complex, technical ones. This active practice is vital for retention.
Learn Common Collocations
Memorizing common phrases like '存在偏差' (there is a deviation), '减小偏差' (reduce deviation), and '标准偏差' (standard deviation) will make using the word much more natural and fluent.
Mind the Register
Be aware that 偏差 is more common in formal and technical settings. While it can be used in neutral contexts, avoid overusing it in very casual conversations where simpler words might be more appropriate.
Cultural Appreciation
Understand that while precision is valued, Chinese culture also acknowledges natural variation. 偏差 helps articulate this balance between striving for accuracy and accepting inherent differences.
Test Yourself
Regularly quiz yourself on the meaning of 偏差 and its synonyms/antonyms. Try to recall sentences or contexts where it's used. Active recall is a powerful tool for long-term memory.
Memorize It
Mnemonic
Think of 'Pian' as 'pain' and 'Cha' as 'char'. If your measurements cause you pain because they are 'charred' or wrong (a deviation), you have 偏差. Or, imagine a 'pianist' (piān) who is 'charming' (chā) but makes small mistakes in their music – that's a musical 偏差.
Visual Association
Visualize a ruler that is slightly bent or warped. The bent part represents the 偏差, showing how the measurement is no longer straight or accurate. Alternatively, picture a target with arrows that are not all hitting the bullseye, but scattered around it; the scattering represents the 偏差.
Word Web
Challenge
Try to find five examples of 偏差 in news articles or scientific journals you read online. Write down the context and what the deviation was from.
Word Origin
The character 偏 (piān) means 'slanting', 'leaning', or 'partial'. It suggests a movement away from the straight or central. The character 差 (chā) means 'difference', 'error', or 'gap'. Together, 偏差 literally suggests a 'slanting difference' or a 'partial gap', implying a deviation from a straight or correct path.
Original meaning: Literally, 'slanting difference' or 'partial error'.
Sino-TibetanCultural Context
While 偏差 is a neutral technical term, in social contexts, a significant deviation from norms or expectations might be viewed negatively, depending on the specific societal values and the nature of the deviation.
In English, 'deviation', 'discrepancy', 'variance', 'error', or 'bias' are common translations, depending on the context. 'Bias' is particularly relevant in psychological and statistical contexts.
Practice in Real Life
Real-World Contexts
Scientific experiment results
- 存在偏差
- 计算偏差
- 减小偏差
Manufacturing and quality control
- 偏差范围
- 偏差值
- 控制偏差
Data analysis and statistics
- 标准偏差
- 偏差分析
- 显著偏差
Project management
- 与目标偏差
- 偏差很大
- 偏差不大
Psychological studies
- 认知偏差
- 系统偏差
- 偏差行为
Conversation Starters
"Did you notice any significant 偏差 in the experiment results?"
"How do we usually measure the 偏差 in our production line?"
"What's the acceptable 偏差 range for this component?"
"Can you explain the difference between 偏差 and 误差 in statistics?"
"Do you think there's a 偏差 between what the report says and the reality?"
Journal Prompts
Describe a time when a small 偏差 led to a significant outcome, either positive or negative.
Reflect on a personal experience where your expectations had a large 偏差 from the actual situation. How did you feel and what did you learn?
Imagine you are a quality control manager. Write a short report about a product with an unacceptable level of 偏差.
Discuss the importance of understanding and quantifying 偏差 in your field of study or work.
How can we use the concept of 偏差 to improve our learning process or decision-making?
Frequently Asked Questions
10 questionsNot necessarily. While 偏差 often implies a departure from an ideal or expected state, it can be neutral or even positive depending on the context. For example, in some fields, a certain amount of 'deviation' might be considered normal variation or even desirable. The key is to understand what the deviation is from and whether it falls within acceptable limits. In scientific research, an unexpected 偏差 can lead to new discoveries.
This is a crucial distinction. 偏差 (piānchā) refers to a factual or measurable deviation from a standard or expected value, often in quantitative contexts like measurements or data. 偏见 (piānjiàn), on the other hand, means 'prejudice' or 'bias' in a subjective, often unfair, way. It refers to a preconceived opinion or inclination that distorts judgment. While both involve '偏' (partial/leaning), their meanings are very different.
Yes, 偏差 can be used metaphorically for non-numerical concepts. For example, one might talk about a 'deviation from the plan' (计划的偏差), a 'deviation from social norms' (社会规范的偏差), or even a 'deviation from one's principles' (原则的偏差). In these cases, it signifies a departure from an established rule, expectation, or norm.
'标准偏差' (biāozhǔn piānchā) translates to 'standard deviation'. It is a statistical measure that quantifies the amount of variation or dispersion of a set of values. A low standard deviation indicates that the values tend to be close to the mean (or expected value) of the set, while a high standard deviation indicates that the values are spread out over a wider range.
In English, 'error' often implies a mistake or fault. 偏差 is more about the difference or deviation itself. While an error can cause 偏差, 偏差 can also occur due to natural variation, inherent limitations of measurement, or factors not considered 'errors'. For example, the natural variation in plant height among a species could be described as 偏差, even if no one made a mistake.
Generally, no. Personality traits are usually described with adjectives. While a behavior might be considered a 'deviation' (偏差) from a norm, the trait itself isn't typically called 偏差. For personality, you might use words like '古怪' (gǔguài - eccentric) or '独特' (dútè - unique), or describe specific behaviors as '不寻常' (bù xúncháng - unusual).
偏差 refers to a deviation from a standard or expected value, often in a quantitative or objective sense. 偏颇 means 'biased' or 'one-sided', usually referring to opinions, judgments, or perspectives that are unfair or unbalanced. While a biased opinion could lead to actions that show 偏差, they are distinct concepts.
Use 偏差 when you are talking about a difference from a specific norm, target, or expected value, especially in technical or scientific contexts. Use 差异 when you are simply comparing two or more things and noting their differences, without necessarily implying a deviation from a standard. For example, the difference between two colors is 差异; the difference between a measured color and the standard color is 偏差.
While 偏差 is a common word, its usage in very casual, everyday conversation might be less frequent than in technical contexts. People might opt for simpler terms like '不一样' (different) or '差一点' (a little off). However, if discussing something that should be precise (like time or measurements), 偏差 can be used even in relatively informal settings.
Common contexts include scientific experiments (results deviating from predictions), engineering (product dimensions deviating from specifications), data analysis (data points deviating from the mean), financial markets (actual performance deviating from forecasts), and psychology (cognitive biases or deviations from rational behavior).
Test Yourself 10 questions
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Summary
偏差 (piānchā) signifies a departure from a standard, expected, or true value, indicating a measurable difference or error. It is a crucial concept in fields requiring precision and accuracy, such as data analysis and engineering.
- 偏差 (piānchā) means deviation or difference from an expected or true value.
- It's used when results aren't exactly as planned or measured.
- Common in fields like science, statistics, and engineering.
- Think of it as a 'slip' or 'drift' from the correct path.
Mastering the Sounds
Pay close attention to the stress on the second syllable ('an'). Practice the 's' sound in Mandarin Chinese, which is often softer than in English. For US English speakers, ensure the 'si' is pronounced as 'shuh' rather than 'see'.
Context is Key
Remember that 偏差 always implies a deviation *from* something. Always consider what the reference point is – is it a target, an average, a standard, or an expectation? Understanding this context is crucial for correct usage.
Distinguishing Similar Words
Actively practice differentiating 偏差 from 差异 (general difference), 误差 (error), and 偏离 (to deviate). Understanding these distinctions will greatly improve your accuracy.
Apply in Technical Fields
When you encounter technical documents, scientific papers, or engineering reports, actively look for the word 偏差. This will reinforce its meaning and usage in its most common and precise contexts.
Example
实验结果存在一定的偏差。
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模糊
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推算
B1To calculate, estimate, or figure out something using data, logic, or mathematical methods. It implies a process of reasoning from known facts to unknown values.
校准
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