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A factory produces a pack of peanuts. A researcher gets sample of 50 packs and computes the mean weight to be 57.2 grams. Based on a previous study, the population standard deviation is 0.15 grams. Round off all answers to two decimal places with complete

A factory produces a pack of peanuts. A researcher gets sample of 50 packs and computes the mean weight to be 57.2 grams. Based on a previous study, the population standard deviation is 0.15 grams. Round off all answers to two decimal places with complete solution.

a. Determine a point estimate for the population mean.

b. Use a 90% confidence to construct and interval estimate for the population mean. 

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A factory produces a pack of peanuts. A researcher gets sample of 50 packs and computes the mean weight to be 57.2 grams. Based on a previous study, the population standard deviation is 0.15 grams. Round off all answers to two decimal places with complete
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