A Researcher Wished to Compare the Effect of the Different

question 39

Multiple Choice

A researcher wished to compare the effect of the different rates of stepping on volunteers' heart rates in a step-aerobics workout.A collection of thirty adult volunteers,fifteen women and fifteen men,were 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 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 mean heart rate at the end of the workout for all the subjects was determined in beats per minute. A partial ANOVA table for these data is given below. What can we say about the P-value for the main effect of the stepping rate group?

• A)P-value < 0.01
• B)0.01 <P-value < 0.05
• C)0.05 <P-value < 0.10
• D)P-value > 0.10

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Definitions:

Increasing Rate

A situation where something grows or rises in value at a progressively higher pace over time.

Marginal Cost

The expenditure associated with creating another single unit of a product or service.

Average Variable Cost

The total variable costs of production divided by the quantity of output produced, illustrating the per-unit variable cost.

Total Cost

The sum of all expenses incurred in the production of goods or services, including fixed and variable costs.