To use the normal distribution to calculate the p-value of a hypothesis test involving the population mean, which assumption is not necessary?
A) The sample is random.
B) The null hypothesis is zero.
C) The sample is "large" enough .
D) None of the answers is correct.

Question

Quizplus · Accepted Answer

Assuming a normal distribution for the sample mean requires the sample to be random and for the sample size to be large enough. However, the null hypothesis does not have to be zero for a hypothesis test involving the population mean.

To Use the Normal Distribution to Calculate the P-Value of a Hypothesis