Statistic & Probability
posted by Bori .
17. Determine the appropriate approach to conduct a hypothesis test for this claim: The systolic blood pressure of men who run at least five miles each week varies less than does the systolic blood pressure of all men. Sample data: n = 100 randomly selected men who run at least five miles each week, sample mean = 108.4, and s = 20.3

16. Determine the appropriate approach to conduct a hypothesis test for this claim: Fewer than 5% of patients experience negative treatment effects. Sample data: Of 500 randomly selected patients, 2.2% experience negative treatment effects (5 point).
A) Use the normal distribution.
B) Use the Student t distribution.
C) Use the chisquare distribution.
D) Use nonparametric or bootstrapping methods.
17. Determine the appropriate approach to conduct a hypothesis test for this claim: The systolic blood pressure of men who run at least five miles each week varies less than does the systolic blood pressure of all men. Sample data: n = 100 randomly selected men who run at least five miles each week, sample mean = 108.4, and s = 20.3 (5 point).
A) Use the normal distribution.
B) Use the Student t distribution.
C) Use the chisquare distribution.
D) Use nonparametric or bootstrapping methods.
18. Determine the appropriate approach to conduct a hypothesis test for this claim: The mean sodium content of a 30 g serving of snack crackers is 2,200 mg. Sample data: n = 130 snack crackers, sample mean = 3,100 mg, and s = 570. The sample data appear to come from a normally distributed population (5 point).
A) Use the normal distribution.
B) Use the Student t distribution.
C) Use the chisquare distribution.
D) Use nonparametric or bootstrapping methods.