A Researcher Wished to Compare the Effect of the Frequency

question 21

Multiple Choice

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 pooled standard error is:

• A)15.5.
• B)75.9.
• C)240.1.
• D)5762.

---

Definitions:

Freedom of Speech

The right to articulate one's opinions and ideas without fear of government retaliation or censorship.

Equality Rights

Legal guarantees for equal treatment and protection under the law without discrimination on the basis of characteristics such as race, gender, age, or religion.

Consumer Scam

Deceptive practices targeting consumers, designed to defraud or obtain financial advantage at the consumer's expense.

Criminal Act

An action that is punishable by law, often involving harm to society or other individuals.