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A random sample of 28 customers at a gas station shows an average gas purchase of...

A random sample of 28 customers at a gas station shows an average gas

purchase of 8.9 gallons with a standard deviation of 3.2 gallons. Find the

98%

confidence interval estimating the population mean number of gallons

purchased at this station. Interpret this result.

math   Statistics-And-Probability   
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