In cases where the population standard deviation is unknown,it is estimated by the sample standard deviation.In this case,the standard error of the mean becomes:
A) mean / proportion
B) standard variate / standard deviate
C) the z-value
D) p (1 - p)
E) sample standard deviation / square root of sample size

Question

Quizplus · Accepted Answer

When the population standard deviation is unknown, the sample standard deviation is used to estimate it, hence, the standard error of the mean becomes the sample standard deviation divided by the square root of the sample size. This is represented by choice E.

In Cases Where the Population Standard Deviation Is Unknown,it Is