Chapter 9.3, Problem 99E

To determine

To explain: Reason it would not be wise to use these data to carry out a significance test about the mean amount spent by all shoppers at this supermarket.

Answer to Problem 99E

The sample is a convenience sample.

Explanation of Solution

Given information:

Consecutive shoppers: $50$

Calculation:

The sample is a convenience sample, as the shoppers were “conveniently” chosen as $50$ consecutive shoppers.

These shoppers who shop on the similar day of the week and on the similar time during the day, which means that we could exclude a part of the population.

The sample is then not representative for the total population.