Biostatistics: practice question

A PSM question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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PSM · Biostatistics

Sample item

What does a correlation coefficient near zero indicate?

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

D. Little linear association between variables

A correlation near zero indicates little linear relationship, but nonlinear associations or confounding may still exist and causation cannot be inferred.

Option by option

  • A. Identical means

    Means can differ independently.

  • B. No possible relationship of any kind

    Nonlinear patterns can remain.

  • C. Perfect causal relationship

    Correlation does not prove causation.

  • D. Little linear association between variables (correct)

    Correct: linear association is weak.

Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.

More PSM questions

Questions about this PSM question

What is the answer to this PSM question?

The best answer is D, Little linear association between variables. A correlation near zero indicates little linear relationship, but nonlinear associations or confounding may still exist and causation cannot be inferred.

Why is "Identical means" not the answer?

Means can differ independently.

Why is "No possible relationship of any kind" not the answer?

Nonlinear patterns can remain.

Why is "Perfect causal relationship" not the answer?

Correlation does not prove causation.

What concept does this question test?

It tests Biostatistics in PSM. The correct option holds because: Correct: linear association is weak.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Biostatistics?

Practise biostatistics with small calculations until sensitivity, predictive values and risk measures are automatic. Then use the flashcards and the other PSM questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.