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6. For a random sample of 50 overweight men, the mean of the number of pounds that they were overweight was 31 lbs. The standard

6. For a random sample of 50 overweight men, the mean of the number of pounds that they were overweight was 31 lbs. The standard deviation of the population is 6 pounds. ! (a) Find the best point estimate of the mean. (b) Find the 99% confidence interval of the mean of these pounds. (c) Find the 95% confidence interval of the mean of these pounds ! (d) Which interval is larger? Why?

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