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What is the upper limit of the interval

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We'd like to find how much money the average shopper spends at the mall per trip. We sample 75 shoppers and we find that their spending averages $49.80. Assume the standard deviation of the population is $16.55, find a 90% confidence interval for the true mean of the spending. What is the upper limit of the interval?

Reference no: EM132191880

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