A researcher wished to compare the effect of the frequency of the rate of stepping on heart rate in a step-aerobics workout. A collection of 30 adult volunteers, 15 women and 15 men, was selected from a local gym. The men were randomly divided into three groups of five subjects each. Each group did a standard step-aerobics workout, with group 1 at a low rate of stepping, group 2 at a medium rate of stepping, and group 3 at a rapid rate. The women were also randomly divided into three groups of five subjects each. As with the men, each group did one of the three standard step-aerobics workouts. The mean heart rate at the end of the workout for all subjects was determined (in beats per minute). A partial ANOVA table for these data is given below. Analysis of variance for heart rate: The factors in the experiment are:
A)rate of stepping and heart rate.
B)rate of stepping and gender.
C)heart rate and gender.
D)gym membership and gender.

Question

A researcher wished to compare the effect of the frequency of the rate of stepping on heart rate in a step-aerobics workout. A collection of 30 adult volunteers, 15 women and 15 men, was selected from a local gym. The men were randomly divided into three groups of five subjects each. Each group did a standard step-aerobics workout, with group 1 at a low rate of stepping, group 2 at a medium rate of stepping, and group 3 at a rapid rate. The women were also randomly divided into three groups of five subjects each. As with the men, each group did one of the three standard step-aerobics workouts. The mean heart rate at the end of the workout for all subjects was determined (in beats per minute). A partial ANOVA table for these data is given below. Analysis of variance for heart rate:  The factors in the experiment are:
A)rate of stepping and heart rate. 
B)rate of stepping and gender. 
C)heart rate and gender. 
D)gym membership and gender.

Quizplus · Accepted Answer

The factors in the experiment are rate of stepping and gender. The men and women are separated into different groups and each group does one of the three standard step-aerobics workouts, therefore the rate of stepping is also a factor. The ANOVA table shows that the main effect of rate of stepping is significant, as well as the main effect of gender, indicating that both factors have an impact on heart rate.

A Researcher Wished to Compare the Effect of the Frequency