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Determine the interval of costs around the mean

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Reference no: EM131126246

According to Consumer Reports, the average annual out-of-pocket costs for a root canal for Americans who do not have dental insurance is $1,201.

Assume that this cost follows the normal distribution with a standard deviation of $118. Determine the interval of costs around the mean that includes 99.7% of the sample means.

Reference no: EM131126246

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