Which of the following would increase the power of a signifi

Which of the following would increase the power of a significance test for correlation?

A. changing alpha from 0.05 to 0.01

B. Increasing the variability in the Y scores

C. changing the sample size from N=25 to N=100

D. changing the sample size from N=100 to N=25

Solution

C. changing the sample size from N=25 to N=100