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Business, 14.12.2019 05:31 ukyflyfl

The amount of material used in making a custom sail for a sailboat is normally distributed with a standard deviation of 64 square feet. for a random sample of 15 sails, the mean amount of material used is 912 square feet. which of the following represents a 99% confidence interval for the population mean amount of material used in a custom sail? a. 912 ± 49.2b. 912 ± 46.8c. 912 ± 42.6d. 912 ± 44.3

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