Chapter 1, Problem 1.40RE

a)

To determine

To identify whether the observational study or experimental study.

Answer to Problem 1.40RE

This is an experimental study.

Explanation of Solution

Given:

In spite of a study that predicted harmful environmental effects, the government lifted a ban on snowmobiles in two national parks in November 2002. The study found that air pollutants would be far higher with snowmobiles than with the snowcoaches that were currently being used. Noise from snowmobiles would be audible over half the time in the parks.

First need to understand about the experimental study and observational study:

Experimental study: Assigning people or things to groups and applying some treatment to one group, while the other group does not receive the treatment.

Observation study: In an observational study, measure or survey members of a sample without trying to affect them.

This study is an experimental study. As researcher need to compare the snowmobile to the snowcoaches. This will be done only by experimental study.

b)

To determine

To find individuals and variables.

Answer to Problem 1.40RE

Individuals are snowmobiles and snowcoaches.

Explanation of Solution

Given:

In spite of a study that predicted harmful environmental effects, the government lifted a ban on snowmobiles in two national parks in November 2002. The study found that air pollutants would be far higher with snowmobiles than with the snowcoaches that were currently being used. Noise from snowmobiles would be audible over half the time in the parks.

First need to know what is mean by individual.

Individuals are the objects described by the set of the data. Therefore, the snowmobiles and snowcoaches are individuals. Variables are air pollutants emitted and noise range.

c)

To determine

To explain whether the government decided to allow snowmobiles, in spite of the study results

Explanation of Solution

Given:

In spite of a study that predicted harmful environmental effects, the government lifted a ban on snowmobiles in two national parks in November 2002. The study found that air pollutants would be far higher with snowmobiles than with the snowcoaches that were currently being used. Noise from snowmobiles would be audible over half the time in the parks.

I agree that government decided to allow snowmobiles, in spite of the study results as snowmobiles can get the job done in less time and with less remaining snow than a snowcoach.