Chapter 1, Problem 1.41RE

a)

To determine

To give the list of the question of interest.

Explanation of Solution

Given:

  

The pie chart shows the percentage of allowance received a week for the children between aged 5 to 12. Therefore, the question becomes, “How much allowance do you receive a week?”

b)

To determine

To identify whether the observational study or experimental study.

Answer to Problem 1.41RE

This is anobservation study.

Explanation of Solution

Given:

  

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 observation study. This survey can be done by just asking a question to the children or their parents.

c)

To determine

To find individuals and variables.

Answer to Problem 1.41RE

An individual is child aged between 5 to 12.

Explanation of Solution

Given:

  

First need to know what is mean by individual.

Individuals are the objects described by the set of the data. Therefore, it is regarding the children aged between 5 to 12. Hence, individual is child aged between 5 to 12. Variables are allowance money.

d)

To determine

To explain why four percentages are makes 100%

Answer to Problem 1.41RE

Explanation of Solution

Given:

  

As these four percentages are rounded percentage. They are not exact percentage. Therefore, its sum is around 99%.