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You measure 28 backpacks' weights, and find they have a mean weight of 69 ounces. Assume the population standard deviation is 7.4 ounces. Based on

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You measure 28 backpacks' weights, and find they have a mean weight of 69 ounces. Assume the population standard deviation is 7.4 ounces. Based on this, construct a 99% confidence interval for the true population mean backpack weight. Give your answers as a _ ME, to two decimal places ounces

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