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Chapter 4: Q 56. (page 254)

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 5.75or 11.5inches high and the metronome beat was 14,21or 28steps per minute. Five students stepped at each combination of height and speed.

Short Answer

Expert verified

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

01

Given Information

The height of the step was 5.75or 11inches high. The metronome beat was14,21,28.

02

To determine

We need to determine:

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

03

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.

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