The purpose of the weighted mean in stratified sampling is:
A)to provide an overall sample mean that represents all the strata.
B)to provide more weight to those strata whose means are the lowest.
C)to provide more weight to those strata whose means are the highest.
D)to provide an overall sample mean that represents the majority of the strata.
E)to provide more weight to those strata whose means are equal.

Question

Quizplus · Accepted Answer

The purpose of the weighted mean in stratified sampling is to provide an overall sample mean that represents all the strata. This is achieved by assigning weights to each stratum based on its proportional contribution to the population, and then calculating the weighted mean by taking the sum of the products of the stratum means and their corresponding weights divided by the sum of the weights. This ensures that each stratum is represented proportionally in the overall sample mean.

The Purpose of the Weighted Mean in Stratified Sampling Is