Chapter 11.8, Problem 6PPSE

Solution

To find: The sampling method used in an investigation done to know the percentage of shoppers who use coupons.

The sampling method used to estimate the percentage of shoppers who use coupons by interviewing every shopper at the greeting card aisle is considered a Convenience sampling method.

Given:

A study is conducted to estimate the percentage of shoppers who use coupons at a supermarket by interviewing every shopper entering the greeting card aisle.

Concept used:

The convenience sampling method is where a sample is selected for study based on convenience or readily available.

Explanation:

The sample selected for the study is collected by interviewing every shopper entering the greeting card aisle in a supermarket. The sample is selected based on convenience as the sample only includes the shoppers who enter the greeting card aisle. The sampling method used is convenience sampling.

The sample selected by interviewing the shoppers entering the greeting card aisle does not represent all shoppers in the supermarket. Thus the sample selected does not represent the entire population. So there exists a bias in the study conducted to know the percentage of shoppers who use coupons at a supermarket by interviewing every shopper entering the greeting card aisle.