{Narrative: Male weight loss} Suppose a 95% confidence interval for the average

Question

{Narrative: Male weight loss}

Suppose a 95% confidence interval for the average amount of weight loss on a diet program for males is between 12.0 and 18.0 pounds. These results were based on a sample of 36 male participants who were deemed to be overweight at the start of the 4-month study.

{Male weight loss narrative} What is the sample mean?

2.45

3.00

2.50

15.0

2 points   

QUESTION 38

{Male weight loss narrative} What is the margin of error?

3.0

4.0

4.9

None of the above

2 points   

QUESTION 39

{Male weight loss narrative} What is the standard error of the sample mean?   

1.5

2.0

2.45

3.0

2 points   

QUESTION 40

{Male weight loss narrative} If the manager of the program claims that a male joins this program will lose about 15 pounds, based on the result of 95% confidence interval for the average amount of weight loss, he tells

A lie because 15 pounds is not in the interval.

Truth because 15 pounds is in the interval   

Can’t decide because there is not enough information.   

2.45

3.00

2.50

15.0

Explanation / Answer

Sample Mean = a+b/2 = 12+18/2 = 15 is the finals answer for the 1st question

margin of error = (b-a)/2 = 18-12/2 = 3 is the final answer fot second question

Truth because 15 pounds is in the interval is the fina answer for last question

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