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A random sample of 55 charges on a credit card had a mean of $57.65.The population standard deviation is $12.56.You are asked to construct a

A random sample of 55 charges on a credit card had a mean of $57.65.The population standard deviation is $12.56.You are asked to construct a 92% confidence interval. Based on that information, answer the following questions.

A.What is /2?

B.Write down either the formula you will use or the calculator command.

C.State the interval.Round to two decimal places if possible.

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