Based on the eperimental descriptions below, please answer questions about the d

Question

Based on the eperimental descriptions below, please answer questions about the design of the experiments.

Experiment 1: Effects of exercise

In the previous lab, you determined the effects of exercising for 3 minutes on a bicycle ergometer for all students in the class to answer the research question: What is the effect of exercise on heart rate and breathing rate in college students, as compared to a resting state?

a. What was the independent variable?

-breathing rate

-exercise

-heart rate

-resting state

b. What was (were) the dependent variable(s)? Choose ANY that apply.

-breathing rate

-exercise

-heart rate

-resting state

c. What is the population in this experiment?

d. What was the sample?

Explanation / Answer

A) Independent variables are those that are changed in an experiment. The experiment was performed to study the effect of exercise on heart rate and breathing rate in college students, as compared to a resting state. Here the independent variable is the exercise.

B) Dependent variables are the variables of interest in an experiment. Here, the dependent variables include breathing rate and heart rate.

C) The population of this experiment is healthy adults.

D) The sample was college students.

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