A research article gives a p-value of .001 in the analysis section. Which definition of a p-value is the most accurate?
Question
A research article gives a p-value of .001 in the analysis section. Which definition of a p-value is the most accurate?
Solution
A p-value is a statistical measure that helps scientists determine whether their hypotheses are correct. It is a number between 0 and 1 and interpreted in the following way: A small p-value (typically ≤ 0.05) indicates strong evidence against the null hypothesis, so you reject the null hypothesis. A large p-value (> 0.05) indicates weak evidence against the null hypothesis, so you fail to reject the null hypothesis. P-values very close to the cutoff (0.05) are considered to be marginal (could go either way). In this case, a p-value of .001 is very small, indicating strong evidence against the null hypothesis.
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