Which of the following will increase the power of a statistical test?
A)Change α from .05 to .01
B)Change from a one-tailed test to a two-tailed test
C)Change the sample size from n = 25 to n = 100
D)None of the other three options will increase the power.

Question

Which of the following will increase the power of a statistical test?​
A)​Change α from .05 to .01
B)​Change from a one-tailed test to a two-tailed test
C)​Change the sample size from n = 25 to n = 100
D)​None of the other three options will increase the power.

Quizplus · Accepted Answer

Increasing the sample size will generally increase the power of a statistical test by decreasing the standard error and increasing the likelihood of detecting a true effect. Changing the significance level (α) or the directionality of the test (one-tailed vs. two-tailed) will not necessarily increase power, but may increase the risk of making a Type I error or reduce the precision of the test. Therefore, option C is the best choice as it directly addresses the power of the test.

Which of the Following Will Increase the Power of a Statistical