Chapter 4.1, Problem 3E

To determine

To identify whether the envelopes are completely sealed and to identify the population and the sample.

Answer to Problem 3E

Yes, the envelopes are sealed.

Population is $1000$ envelopes, and sample is $40$ envelopes.

Explanation of Solution

Given information:

The population is the $1000$ envelopes stuffed during a given hour.

Yes, the envelopes are completely sealed for mailing.

Population is the whole group of individuals about which the information is needed. The need is to check whether envelopes are completely sealed.

A sample is a small part of a population about which the information is collected. Here inspectors choose $40$ envelopes from the $1000$ envelopes stuffed during a given hour hence the sample is the $40$ envelopes

selected.