If the population parameters are known, the t test is _________ powerful than the z test.
A) more
B) less
C) equally
D) need more information

Question

Quizplus · Accepted Answer

When the population parameters are known, the z test is more appropriate and powerful than the t test because the t test is designed for situations where the population standard deviation is unknown and has to be estimated from the sample.

If the Population Parameters Are Known, the T Test Is