Chapter 12.5, Problem 30PPE

To determine

To find: The sample is random, systematic and stratified sample, identify the population and sample.

Answer to Problem 30PPE

The sample is systematic, population and sample is identified.

Explanation of Solution

Given information:

A restaurant asks every third customer to complete an evaluation form.

Calculation:

Consider the question

Here A restaurant asks every third customer to complete an evaluation form..

Therefore, population is all the customer of the restaurant.

And every third customer of the restaurant is the sample.

Therefore, survey is held in fixed number of customer.

Systematic sample: If select any number $k$ at random, and survey every $k^{th}$ person in the population, then sample is called systematic sample.

For every fifteenth customer $k=3$ , customer who come to restaurant is systematic.

Therefore, the sample is systematic.