Chapter 13, Problem 10E

a)

To determine

To find the type of the study.

Answer to Problem 10E

This is an experimental study.

Explanation of Solution

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 is an experimental study because the treatment is imposed on the subjects.

b)

To determine

To find the subjects.

Answer to Problem 10E

40 volunteers suffering from insomnia.

Explanation of Solution

In this study, the subjects studied were 40 volunteers who were suffering from insomnia.

c)

To determine

To find the factors and number of levels.

Answer to Problem 10E

No-dessert diet with 2 levels and Exercise program with 2 levels.

Explanation of Solution

In this study, the experiment having 2 factors which are No-Dessert diet and Exercise program. Also, there are 2 levels in each factor. Desert level having no desert and normal desert. And exercise having levels as no exercise and an exercise program.

d)

To determine

To find the number of treatments.

Answer to Problem 10E

4

Explanation of Solution

In this study, there are 4 treatments.

e)

To determine

To find the response variable.

Answer to Problem 10E

The response variable is improvement in ability to sleep.

Explanation of Solution

In this study, the response variable is improvement in ability to sleep

f)

To determine

To identify the type experiment.

Answer to Problem 10E

Completely randomized experiment.

Explanation of Solution

The experiment is completely randomized because subjects were randomly assigned to a treatment.

g)

To determine

To identify whether the study is blinded or double blinded.

Answer to Problem 10E

The experiment is not blinded.

Explanation of Solution

The experiment is not blinded because the subjects know that the receiving the no-desserts diet or not. Also, they know whether the received the exercise program or not.

h)

To determine

To explain the scope and conclusions.

Explanation of Solution

The experiment indicates that the subjects who ate no desserts and engaged in exercise will show the most improvement in their ability to sleep.