When testing for the population mean when sigma is known and a sample size is greater than 30, the population must be normally distributed in order for the conclusions to be reliable.

Question

Quizplus · Accepted Answer

According to the Central Limit Theorem, when the sample size is greater than 30, the sampling distribution of the sample mean will be approximately normally distributed regardless of the shape of the population distribution.

When Testing for the Population Mean When Sigma Is Known