Evidence-Based Practice (EBP) II Practice Exam

If a study reports a p-value greater than 0.05, what does this indicate?

The result is statistically significant. The result is not statistically significant. The study has high statistical power. The confidence interval is narrow.

Correct Answer:

The result is not statistically significant.

Explanation:

P-values gauge how compatible the observed data are with the null hypothesis. If the p-value is greater than 0.05, we do not have enough evidence to reject the null at the conventional 5% significance level, so the result is not statistically significant. This means the data don’t show a statistically reliable effect at that threshold, not that there is definitely no effect. It could reflect limited sample size or variability rather than a true absence of an effect. It’s also not a direct measure of study power or of how precise the estimate is; a high p-value doesn’t guarantee high power or a narrow confidence interval.

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