Chapter 9.3, Problem 95E

To determine

To Explain: that using these data would not be prudent to run a significance test around the total amount spent on this store by all shoppers.

Answer to Problem 95E

Convenience sample

Explanation of Solution

A convenient sample is a type of non-probability sampling process in which the sample is collected from an easy to touch or meet group of people. For example, a convenience survey will be to stand at a mall or a grocery store and ask customers to answer questions. This method of sampling is also called grab sampling, or sampling of availability. The survey is a study of choice, since the shoppers were selected since 50 consecutive shoppers "conveniently."

There would also shoppers who shop during the day on the same day of the week and at the same time, which suggests a portion of the community may be omitted.

Therefore, the survey is not representative for the whole population.