In order to increase the power of z test,one might
A)increase sample size.
B)use a two-tailed test.
C)decrease sample size.
D)none of the options is correct

Question

Quizplus · Accepted Answer

Increasing the sample size will increase the power of the z test, as it will decrease the standard error and increase the likelihood of finding a significant difference between the sample mean and population mean. Using a two-tailed test may or may not increase the power but it depends upon the research question and hypothesis. Decreasing sample size will decrease the power of the z-test as it will increase the standard error and decrease the likelihood of finding a significant difference between the sample mean and population mean. Therefore, the best choice is to increase the sample size.

In Order to Increase the Power of Z Test,one Might