Die Kreuzvalidierung an einer unabhängigen Stichprobe
Cross-validation on an independent sample
Literally: The cross-validation on an independent sample
In 15 Seconds
- Testing a model on new, untouched data for accuracy.
- A hallmark of high-level German academic and professional rigor.
- Used to prove results aren't just a one-time fluke.
Meaning
It is the process of testing a theory or model on a completely new group of data to see if the results hold up. Think of it as double-checking your work using a fresh set of eyes to make sure you didn't just get lucky the first time.
Key Examples
3 of 6Presenting a master's thesis
Die Kreuzvalidierung an einer unabhängigen Stichprobe hat meine Hypothese bestätigt.
The cross-validation on an independent sample confirmed my hypothesis.
Discussing a marketing campaign
Bevor wir das Budget erhöhen, brauchen wir eine Kreuzvalidierung an einer unabhängigen Stichprobe.
Before we increase the budget, we need cross-validation on an independent sample.
Texting a study partner
Hast du die Kreuzvalidierung an einer unabhängigen Stichprobe schon fertig?
Have you finished the cross-validation on an independent sample yet?
Cultural Background
There is a high expectation of 'Methodentreue' (methodological faithfulness). Skipping a cross-validation step is often seen as a sign of sloppy work or 'Pfusch'. The culture of testing and validation is deeply rooted in the history of German engineering and the DIN (Deutsches Institut für Normung) standards. In Germany, obtaining an 'unabhängige Stichprobe' can be legally complex due to strict data privacy laws (DSGVO). Researchers must be very careful how they collect and separate data. In Switzerland, particularly in the pharmaceutical industry (Basel), this phrase is used with extreme frequency to denote the highest level of quality assurance.
Use it in Interviews
If you are applying for an analytical role, drop this phrase to show you care about data integrity.
Don't use 'mit'
While 'mit' is understood, 'an' is the mark of a native-level speaker in this context.
In 15 Seconds
- Testing a model on new, untouched data for accuracy.
- A hallmark of high-level German academic and professional rigor.
- Used to prove results aren't just a one-time fluke.
What It Means
Imagine you have a secret recipe for the perfect coffee. You test it on your family, and they love it. But do they love it because it's good, or because they're your family? To be sure, you need die Kreuzvalidierung an einer unabhängigen Stichprobe. You take that coffee to a group of strangers in another city. If they love it too, your recipe is officially a success. In science and data, this means taking your findings and applying them to data you haven't touched yet. It proves your results aren't just a happy accident.
How To Use It
You will mostly use this in academic or professional settings. It sounds very smart and highly technical. You can use it as a noun phrase to describe a step in a project. For example, "We are currently performing die Kreuzvalidierung an einer unabhängigen Stichprobe." It shows you are being thorough and careful. Even if you aren't a scientist, using it metaphorically can show you have a sharp, analytical mind. Just make sure the person you are talking to appreciates a bit of jargon.
When To Use It
Use this phrase during a university presentation or a business meeting. It is perfect when discussing data, market research, or any kind of testing. If you are defending a thesis, this phrase is your best friend. It signals to your professors that you understand the scientific method. You can also use it in a tech-heavy office when discussing machine learning models. It adds a layer of professional gravity to your work.
When NOT To Use It
Avoid this phrase at a first date—unless you are both data scientists. It is far too formal for a casual night out. Don't use it when talking about simple things like choosing a movie. Saying you need a Kreuzvalidierung for a Netflix pick will make you sound like a robot. It’s also too long for quick texting unless you’re discussing a shared project. Keep it out of the grocery store or the gym.
Cultural Background
Germany is world-famous for its precision and "Gründlichkeit" (thoroughness). This phrase perfectly captures that spirit. In German academia, being "unabhängig" (independent) is a mark of high quality. There is a deep cultural respect for systems that are tested and proven. This isn't just a math term; it's a reflection of a culture that values reliability over quick, unverified wins. It’s the linguistic equivalent of a German car inspection.
Common Variations
You might hear people simply say Kreuzvalidierung to save time. Sometimes they use externe Validierung (external validation) which means almost the same thing. In more casual tech circles, you might hear the English term "Cross-Validation" mixed into German sentences. However, using the full German phrase shows a much higher level of linguistic mastery. It marks you as someone who has truly reached the C1 level.
Usage Notes
This is a high-register academic expression. It is almost exclusively used in written reports, formal presentations, or technical discussions. Using it correctly signals a high level of education and professional competence.
Use it in Interviews
If you are applying for an analytical role, drop this phrase to show you care about data integrity.
Don't use 'mit'
While 'mit' is understood, 'an' is the mark of a native-level speaker in this context.
The 'Gründlichkeit' Factor
Germans love the idea of 'Absicherung'. This phrase is music to a German manager's ears.
Examples
6Die Kreuzvalidierung an einer unabhängigen Stichprobe hat meine Hypothese bestätigt.
The cross-validation on an independent sample confirmed my hypothesis.
This is the classic, textbook use of the phrase in academia.
Bevor wir das Budget erhöhen, brauchen wir eine Kreuzvalidierung an einer unabhängigen Stichprobe.
Before we increase the budget, we need cross-validation on an independent sample.
Used here to demand more evidence before spending money.
Hast du die Kreuzvalidierung an einer unabhängigen Stichprobe schon fertig?
Have you finished the cross-validation on an independent sample yet?
Even in a text, the full phrase is used for clarity in a study context.
Meine Mutter mag ihn, aber ich brauche eine Kreuzvalidierung an einer unabhängigen Stichprobe – meinen Freunden.
My mom likes him, but I need a cross-validation on an independent sample – my friends.
Using a heavy academic term for a personal situation creates humor.
Ohne eine Kreuzvalidierung an einer unabhängigen Stichprobe sind diese Umfragewerte wertlos.
Without cross-validation on an independent sample, these poll numbers are worthless.
Expresses strong skepticism about data quality.
Die Wirksamkeit des Medikaments erfordert eine Kreuzvalidierung an einer unabhängigen Stichprobe.
The effectiveness of the drug requires cross-validation on an independent sample.
Highlights the life-and-death importance of the procedure.
Test Yourself
Füllen Sie die Lücken mit der richtigen Präposition und dem richtigen Artikel.
Wir führen die Kreuzvalidierung ___ ___ unabhängigen Stichprobe durch.
Die Präposition 'an' verlangt hier den Dativ (feminine: einer).
Welches Wort passt am besten in den wissenschaftlichen Kontext?
Um die Ergebnisse zu sichern, brauchen wir eine ___.
'Stichprobe' ist der korrekte Fachbegriff für 'sample'.
Verbinden Sie die Begriffe mit ihrer Bedeutung.
Begriffe: 1. Kreuzvalidierung, 2. Unabhängig, 3. Stichprobe
Kreuzvalidierung ist das Verfahren, unabhängig bedeutet unbeeinflusst, und die Stichprobe ist die Teilmenge.
Vervollständigen Sie den Satz des Professors.
Professor: 'Ihre Theorie ist interessant, aber wo ist die ___?'
Dies ist der präziseste und formalste Ausdruck.
🎉 Score: /4
Visual Learning Aids
Practice Bank
4 exercisesWir führen die Kreuzvalidierung ___ ___ unabhängigen Stichprobe durch.
Die Präposition 'an' verlangt hier den Dativ (feminine: einer).
Um die Ergebnisse zu sichern, brauchen wir eine ___.
'Stichprobe' ist der korrekte Fachbegriff für 'sample'.
Match each item on the left with its pair on the right:
Kreuzvalidierung ist das Verfahren, unabhängig bedeutet unbeeinflusst, und die Stichprobe ist die Teilmenge.
Professor: 'Ihre Theorie ist interessant, aber wo ist die ___?'
Dies ist der präziseste und formalste Ausdruck.
🎉 Score: /4
Frequently Asked Questions
10 questionsEs ist ein zusammengesetztes Substantiv (compound noun) und wird immer zusammengeschrieben.
In der IT-Branche ist das üblich, aber in formalen deutschen Texten ist 'Kreuzvalidierung' besser.
Eine Stichprobe ist ein statistischer Begriff für eine Auswahl aus einer Grundgesamtheit.
Weil sie nicht für das Training des Modells verwendet wurde. Sie ist 'frisch'.
Ja, man kann 'kreuzvalidieren' sagen, aber das Substantiv ist gebräuchlicher.
Nein, es wird auch metaphorisch in der Logik und im Business verwendet.
Man könnte sagen: 'Das müssen wir nochmal mit anderen Daten gegenprüfen.'
Dann ist das Modell nicht 'generalisierbar' und muss überarbeitet werden.
Ja, wenn man sich auf das Objekt bezieht, an dem der Test durchgeführt wird.
In einem wissenschaftlichen Kontext nicht, aber beim Abendessen mit Freunden schon.
Related Phrases
{die|f} Replikationskrise
builds onThe crisis where many scientific studies cannot be reproduced.
{das|n} Overfitting
contrastWhen a model is too closely fit to a limited set of data.
{die|f} Blindstudie
similarA study where participants don't know if they are in the test or control group.
{die|f} empirische Evidenz
specialized formEvidence gained by means of observation or experimentation.
