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A marketing researcher is interested in estimating the mean amount of money spent on lunch by college students. The average amount spent on lunch by

A marketing researcher is interested in estimating the mean amount of money spent on lunch by college students. The average amount spent on lunch by a SRS of 10 students is $6.30 with a standard deviation of $2.21. Find the 90% confidence interval for the population mean amount spent on lunch every day.

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