Chapter 4.2, Problem 56E

To determine

To identify: units or subjects of experimentation, explanatory variables, treatments and response variables

Explanation of Solution

A research study has calculated the rise in students' core grades as they have walked up to the beat of a metronome for three minutes.

That is why,

Subjects: Each combination of height and pace was attended by five students. Students are also the subjects.

Explanatory variables: The response here depending on the phase height and the metronome speed, which is the reasons for this.

Treatments: the various conditions in which heart rates are measured here, so there are 6 height and rate variations. These 6 procedures are the following:

1) and twenty-one steps per minute

2) and fourteen steps a minute

3) and twenty-eight steps in a minute

4) and twenty-one steps in a minute

5) and fourteen steps in a minute

6) as well as twenty-eight steps in a minute.

Response variable: here, the heart rate is measured for each of the five students and the response variable is the heart rate.