Chapter 4.1, Problem 19E

To determine

To find out is it an SRS and explain your answer.

Answer to Problem 19E

It is an stratified random sampling.

Explanation of Solution

A corporation employs $2000$ male and $500$ female engineers. A stratified random sample of $200$ male and $50$ female engineers gives every individual in the population the same chance to be chosen for the sample.

Thus, from this we get that this method is called stratified random sampling as the sample chosen from the population gives every individual in the population the same chance to be chosen for the sample which the simple random sampling does not give. And also the population is divided in the strata. Thus we can say that it is the stratified random sampling method used in the above case.