Chapter 1.1, Problem 1.20E

a)

To determine

To find the population and sample from given study.

Answer to Problem 1.20E

Population is all Minneapolis households and sample is 500 residential addresses.

Explanation of Solution

Given:

A flour company wants to know what fraction of Minneapolis households bake some or all of their own bread. A sample of 500 residential addresses is taken, and interviewers are sent to those addresses. All of the inter-views take place during regular working hours on weekdays.

First need to understand about sample and population.

Population: It is the set of all the possible individuals possessing the characteristic of interest in a study.

Sample: It is the subset of population on which, the actual study performed and from which, the necessary measurements are taken.

In given study,

Population involves all the Minneapolis households. The researcher wants to know the residential addresses of which somebody was at home during regular working hours on weekdays and who were willing to answer the interviewer. Therefore, that 500 residential addresses are sample.

b)

To determine

To know whether sample will provide accurate information to the flour company.

Answer to Problem 1.20E

The sample will not provide accurate information to the flour company.

Explanation of Solution

Given:

A flour company wants to know what fraction of Minneapolis households bake some or all of their own bread. A sample of 500 residential addresses is taken, and interviewers are sent to those addresses. All of the inter-views take place during regular working hours on weekdays.

The information based on the sample might not be accurate as some people who are at home during regular working hours o weekdays will have a time to bake own bread as compare to people who are working during the regular work hours.