How can statistical power be increased?
A) Increase the population variance
B) Increase the sample size
C) Increase Type I error protection (e.g., change α from .10 to .05)
D) Increase the value of the standard error

Question

Quizplus · Accepted Answer

Increasing the sample size increases the likelihood of finding a significant effect, and therefore increases statistical power. Option A is incorrect as increasing the population variance decreases statistical power. Option C is incorrect as increasing type I error protection decreases the probability of finding a significant effect, and therefore decreases statistical power. Option D is incorrect as increasing the standard error also decreases statistical power.

How Can Statistical Power Be Increased