Constructing a Confidence Interval for a Population Mean You measure 26 backpacks' weights, and find they have a mean weight of 59 ounces. Assume the population standard deviation is 11.4 ounces. Based on this, construct a 90% confidence interval for the true population mean backpack weight. Round your answers to two decimal places. Enter your answers in the form: Sample Mean ±± Margin of Error

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