Chapter 4, Problem 5CRE

a.

To determine

To find: The possible bias that could occur in the provided case. Also, provide the suggestion to fix the problem.

Answer to Problem 5CRE

Response bias.

Explanation of Solution

Given:

An assessment of public sentiment calls 2000 haphazardly picked private phone numbers, at that point requests to talk with a grown-up individual from the family unit. questioner asks, Tow numerous films have you viewed in a cinema in the previous a year?" In every one of the, 1131 individuals react.

The possible case would include the response bias because if the people are watching movies frequently then they will forget the number that they watched movies and would say a number that comes to their mind. Thus, there is a possibility of response bias.

The response bias could be removed by reducing the time span from 12 months to 3 months.

b.

To determine

To find: The source of bias that is not related to the words. Also, provide the suggestion to fix the problem.

Explanation of Solution

The people have been contacted through the residential landline but the cell phones are used by the young generations and there is a possibility that young generation prefer to watch movies in theaters. Thus, there is a selection bias and it could be removed by including the adults that own cell phone.