🏥 USMLE Exam Prep

A new drug for hyperlipidemia is tested in a randomized controlled trial. Researchers find a p-value of 0.005 when comparing the drug to placebo. This p-value indicates:

A The probability that the null hypothesis is true.
B A 0.5% chance of observing the results if the drug has no effect.
C The effect size of the drug is large.
D The study has high statistical power.

✓ Correct Answer: Option B

A p-value of 0.005 means there is a 0.5% chance of observing the study results (or more extreme) if the null hypothesis (no effect/difference) were true. It indicates statistical significance.

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