Whenever the population standard deviation is unknown, which distribution is used in developing a hypothesis test for a population mean?
A)standard distribution
B)z distribution
C)binomial distribution
D)t distribution
E)none of the above

Question

Quizplus · Accepted Answer

When the population standard deviation is unknown, the t distribution is used in developing a hypothesis test for a population mean. This is because the t distribution accounts for the added uncertainty that comes with estimating the population standard deviation from a sample.

Whenever the Population Standard Deviation Is Unknown, Which Distribution Is