In performing hypothesis tests about the population mean, the population standard deviation should be used if it is known.If it is not known, a t test can be used to test the mean if ___.
A)the sample size is at least thirty
B)the sample is random
C)the population mean is known
D)the population is normally distributed
E)the population is chi-square distributed

Question

Quizplus · Accepted Answer

The Answer of In performing hypothesis tests about the population mean, the population standard deviation should be used if it is known.If it is not known, a t test can be used to test the mean if ___.
A)the sample size is at least thirty
B)the sample is random
C)the population mean is known
D)the population is normally distributed
E)the population is chi-square distributed

In Performing Hypothesis Tests About the Population Mean, the Population