Question

For each of the following exercises, define the appropriate parameter(s) and state the null and alternative
hypotheses.
Student Exercise 1 A water faucet manufacturer claims that the mean flow rate of a certain type of
faucet is less than 2.5 gallons per minute.

Student Exercise 2 Do males and females differ in terms of how many hours per week they exercise?

Student Exercise 3 Is the proportion of men who smoke cigarettes greater than the proportion of women who smoke cigarettes in the United States?

Student Exercise 4 In preschool, are the average weights of boys and girls different?

Student Exercise 5 A local grocery store claims that more than 53% of their customers use coupons.

Student Exercise 6 A medical researcher claims that less than 20% of American adults are allergic to a medication.

Answer 1

1:

Parameter: Mean flow rate of a certain type of faucet. It is

2:

Parameter: True difference in average hours per week males and females exercise

3:

Parameter: True difference in proportion of men and women who smoke cigarettes

4:

Parameter: In pre school, true difference in average weights of boys and girl

5:

Parameter: In the local grocery store true proportion of customers use coupon

6:

Parameter: True proportion of American adults are allergic to a medication

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