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Periodically, a town water department tests the the drinking water of homeowners for contaminants such as lead. The lead levels in water specimens collected for a sample of 10 residents of the town had a mean of 2.4 ​mg/L and a standard deviation of 1.3 ​mg/L. Complete parts a through c.

a. Construct a 95​% confidence interval for the mean lead level in water specimens from the town.

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