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Determining a confidence interval

Computer Services, Inc., wants to determine a confidence interval for the average CPU time of their teleprocessing transactions. A sample of 64 transactions yielded a mean of 6 seconds with a standard deviation of 0.8 seconds. Determine a 98% confidence interval for the average CPU time.

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Upper Confidence Interval = Mean + Z value for 98% x std ...

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The solution determines a confidence interval for the average CPU time of teleprocessing transactions.

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