Chapter 4.1, Problem 36E

To determine

To select a response for the multiple choice question given.

Answer to Problem 36E

The option (c) is correct.

Explanation of Solution

In the question, $15$ high schools were randomly selected and the test was administered to every tenth grade student in the selected high schools.

If we consider the high schools as the non-overlapping subgroup, then we randomly selected subgroups and the entire subgroup was then in the sample. This implies that we have Cluster sampling. Thus the option (c) is correct option.