Biostatistics & Research · single question
A study reports P < 0.05. The correct interpretation is:
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Correct answer: A. Reject the null hypothesis; the result is statistically significant
- A. Correct. P < 0.05 means the observed result is unlikely under the null hypothesis, so the null is rejected and the result is statistically significant.
- B. A small p-value argues against, not for, the null.
- C. Statistical significance does not equal a large or clinically important effect size.
- D. A significant result still carries up to a 5% chance of a Type I (false-positive) error.
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