Question

Exercise and heart rate A student project measured the increase in the heart rates of fellow students when they stepped up and down for three minutes to the beat of a metronome. The step was either $5.75$or $11.5$inches high and the metronome beat was $14,21$or $28$steps per minute. Five students stepped at each combination of height and speed.

Short answer

Subject: Combination of height and weight .

Explanatory variables: phase height and metronome speed.

Treatments:There are six height and rate variations.

Response Variables: Heart rate

Step-by-step solution

Given Information

The height of the step was $5.75$or $11$inches high. The metronome beat was$14,21,28$.

To determine

We need to determine:

Subjects of experimentation, explanatory variables, treatments and response variables.

Explanation

Subject: Combination of height and weight attended by five students. Students are subjects also,
Explanatory variables: Response depends on phase height and metronome speed.

Treatments:There are six height and rate variations. The procedures are:

1. Twenty one steps per minute.
2. Fourteen steps a minute.
3. Twenty eight steps in a minute.
4. Twenty one steps in a minute.
5. Fourteen steps in a minute.
6. Twenty eight steps per minute.

Response Variables: Heart rate is response variable as it is measured for five students.