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OpenStudy (anonymous):

A manufacturer of small appliances employs a market research firm to estimate retail sales of its products. Here are last month's sales of electric can openers from an SRS of 20 stores in the Midwest sales region: 19 19 16 19 25 26 24 63 22 16 13 26 34 10 48 16 20 14 13 24 Find the 95% t confidence interval for the mean.

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