When the population is normally distributed and the population standard deviation ? is unknown,then for any sample size n,the sampling distribution of $\bar { X }$
is based on the z distribution.

Question

When the population is normally distributed and the population standard deviation ? is unknown,then for any sample size n,the sampling distribution of $\bar { X }$ 
is based on the z distribution.

Quizplus · Accepted Answer

When the population standard deviation is unknown, for any sample size n, the sampling distribution of $\bar{X}$ is based on the t-distribution, not the z-distribution.

When the Population Is Normally Distributed and the Population Standard Xˉ\bar { X }Xˉ

When the Population Is Normally Distributed and the Population Standard $\bar { X }$