Manufacturers were subdivided into groups by volume of sales.Those with more than $100 million in sales were classified as Class A large;those from $50 to $100 million as Class A medium size;and those between $25 and $50 million... ,and so on.Samples were then selected from each of these groups.What is this type of sampling called?
A)Simple random
B)Stratified random
C)Cluster
D)Systematic

Question

Quizplus · Accepted Answer

This is an example of stratified random sampling, where the population is divided into strata based on a certain characteristic, and then samples are randomly selected from each stratum.

Manufacturers Were Subdivided into Groups by Volume of Sales