Chapter 13, Problem 18E

a)

To determine

To find the type of the study.

Answer to Problem 18E

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 18E

An inactive dogs.

Explanation of Solution

The subjects studied were inactive dogs.

c)

To determine

To find the factors and number of levels.

Answer to Problem 18E

The type of dog food with 2 levels.

Explanation of Solution

In this study, the factor is type of dog food. There are 2 levels. The low-calorie and standard.

d)

To determine

To find the number of treatments.

Answer to Problem 18E

2

Explanation of Solution

In this study, there are 2 treatments.

e)

To determine

To find the response variable.

Answer to Problem 18E

The response variable is weight of the dogs.

Explanation of Solution

In this study, the response variable is weight of the dogs.

f)

To determine

To identify the type of design.

Answer to Problem 18E

Blocking.

Explanation of Solution

The experiment used a blocking by size and breed.

g)

To determine

To identify whether the study is blinded or double blinded.

Answer to Problem 18E

The experiment is used blinded design.

Explanation of Solution

As per overall study, it looks like owner of the dog does not know about the food they are feeding to the dog. Therefore, the experiment is blinded.

h)

To determine

To explain the scope and conclusions.

Explanation of Solution

There should be any prescribed feeding levels so that there could be some conclusion about whether or not the dog food helping the dogs to maintain weight of the dog.