Refer to the information in Problem 18. (a) Give a 95% confidence interval for the mean consumption
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Refer to the information in Problem 18.
(a) Give a 95% confidence interval for the mean consumption among teenage boys in your county.
(b) The confidence interval in
(b) has a wide margin of error.What sample size would you suggest if you wanted a margin of error of only 75 kcal?
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