Chapter 5, Problem 5.79RE

(a)

To determine

To explain what population the newspaper wants information about.

Answer to Problem 5.79RE

All citizens of the West Lafayette’s Village area.

Explanation of Solution

The population contains all individuals/subjects about which we want to collect information.

Population=All citizens of the West Lafayette’s Village area.

(b)

To determine

To find out is the proportion of this population who favor one-way streets almost certainly larger or smaller than the proportion $\raisebox{1ex}{$14$}\!\left/ \!\raisebox{-1ex}{$98$}\right.$ in the sample and explain why.

Answer to Problem 5.79RE

It will be larger.

Explanation of Solution

The sample consist of people who called the newspaper’s Express yourself opinion line. Only people who tend to have the strongest opinions tend to voluntary make such a call. Most of the people who complain against the one-way streets will do so because they hope that it will change when they report it and thus the people who are against the one-way streets are more likely over represented.

The people in favor of one-way streets are then under represented and thus we expect the population proportion to be larger than the sample proportion $\raisebox{1ex}{$14$}\!\left/ \!\raisebox{-1ex}{$98$}\right.$ .