In ________ of the cases, the mean of a sample selected by EPSEM will be more than±3 Z's from the population mean.
A) less than 1%
B) more than 5%
C) more than 90%
D) more than 99%

Question

Quizplus · Accepted Answer

EPSEM sampling ensures that every element in the population has an equal chance of being selected for the sample, resulting in a representative sample. As a result, only a tiny fraction of the time, less than 1%, would the sample mean be more than ±3 Z's from the population mean.

In ________ of the Cases, the Mean of a Sample