Chapter 13, Problem 11E

a)

To determine

To find the type of the study.

Answer to Problem 11E

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 drinking alcoholic beverages were imposed on the subjects.

b)

To determine

To find the subjects.

Answer to Problem 11E

The subjects studied were 24 volunteers.

Explanation of Solution

In this study, the subjects studied were 24 volunteers. There are 12 volunteers who were receiving supplemental estrogen and 12 other volunteers who not on estrogen.

c)

To determine

To find the factors and number of levels.

Answer to Problem 11E

Supplemented estrogen with 2 levels and Alcoholic beverage with 2 levels.

Explanation of Solution

In this study, the factors are Supplemented estrogen and alcoholic beverage. There are 2 levels for each factor.

d)

To determine

To find the number of treatments.

Answer to Problem 11E

2

Explanation of Solution

In this study, there are 2 treatments in which drink alcohol beverages and did not drink alcohol beverage.

e)

To determine

To find the response variable.

Answer to Problem 11E

The response variable is change in estrogen level.

Explanation of Solution

In this study, the response variable is change in estrogen level.

f)

To determine

To identify the type of design.

Answer to Problem 11E

Blocked experiment.

Explanation of Solution

The experiment is blocked design because the subjects were blocked by whether or not they used supplemental estrogen.

g)

To determine

To identify whether the study is blinded or double blinded.

Answer to Problem 11E

The experiment is not blinded.

Explanation of Solution

The experiment is not blinded because the subjects know that if they drank an alcoholic beverage or not.

h)

To determine

To explain the scope and conclusions.

Explanation of Solution

The experiment indicates that the alcohol may increase the estrogen levels of those who take supplemental estrogen.