Question: For a random sample of 60 overweight men, the mean of the number of pounds that they were overweight was 30. The standard deviation of

For a random sample of 60 overweight men, the mean of the number of pounds that they were overweight was 30. The standard deviation of the population is 4.2 pounds.

a. Find the best point estimate of the average number of excess pounds that they weighed.

b. Find the 95% confidence interval of the mean of these pounds.

c. Find the 99% confidence interval of these pounds.

d. Which interval is larger? Why?

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