When calculating a sample size, which of the following statements is incorrect regarding the relationship among variables?
A) As the sample size increases, the statistical power increases.
B) If variation in outcome decreases, the statistical power increases.
C) If variation in outcome increases, the sample size needs to decrease.
D) If the effect size decreases, the sample size needs to increase.

Question

Quizplus · Accepted Answer

C is incorrect because if the variation in outcome increases, the sample size needs to increase, not decrease, to maintain the same level of statistical power.

When Calculating a Sample Size, Which of the Following Statements