4) A sample of 16 overweight people take a new reducing pill for 6 weeks and have a mean weight loss of 20 Ibs. The standard deviation is 8 Ibs. You may assume that the distribution is normal. a) Find...

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Extracted text: 4) A sample of 16 overweight people take a new reducing pill for 6 weeks and have a mean weight loss of 20 Ibs. The standard deviation is 8 Ibs. You may assume that the distribution is normal. a) Find a 95% confidence interval for the mean weight loss. b) If the same information was found using a sample of 50, how would that cffect the length of the confidence interval 5) The