Chapter 1.2, Problem 1.31E

a)

To determine

To give the list of the question of interest.

Explanation of Solution

Given:

  

The survey taken to check how often people eat meat. Therefore, the question is, “How often do you eat meat?” The options of answer are:

1)Daily

2)3-plus times a week

3)Twice a week

4)Once a week or less

5)Never

b)

To determine

To identify whether the observational study or experimental study.

Answer to Problem 1.31E

This is an observational 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. In this study, researcher asked to people about the how often they eat meat.

c)

To determine

To individuals, variables, categorical and quantitative variables.

Explanation of Solution

Given:

  

First need knows about the individual, variables, categorical and quantitative variables:

The individuals are said to be an object of a data described by the set of data.

The variables are the headers in which survey is investigated.

Categorical variable: It describes the quality or characteristics of the data. It does not have numeric or quantitative meaning.

Quantitative variable: The variable expressed numerically and it has numeric meaning.

Therefore, Individuals are all Americans, variables are frequency of eating. There are options given for the question which are categories. Hence, frequency of the eating meat is a categorical variable.