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In a random sample of 54 patients at a hospitals' minor emergency department, the mean waiting time (in minutes) before seeing a medical professional was

In a random sample of 54 patients at a hospitals' minor emergency department, the mean waiting time (in minutes) before seeing a medical professional was 12.4 minutes and the standard deviation was 5minutes.

Construct a 95% confidence interval for the population mean. (Assume the waiting time is normally distributed).

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