A Researcher Wished to Compare the Effect of the Different

question 34

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 is the value of the degrees of freedom for error?

• A)5
• B)11
• C)24
• D)29

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Definitions:

Air Suspension

Air suspension is a type of vehicle suspension powered by an electric or engine-driven air pump or compressor, which inflates flexible bellows to adjust the car's level, reduce the effect of shock forces, and improve ride quality.

Regulated Pressure

The control or maintenance of pressure levels within specific limits in a system, achieved through the use of valves, regulators, or other controlling devices.

Axle Saddle

is a part of a vehicle's chassis that supports the axle, allowing it to bear the weight of the vehicle as well as enabling smooth movement and load distribution across the axle.

Multi-leaf Spring Pack

A suspension component consisting of several layers of metal springs stacked together to absorb impact.