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Estimate of the mean waiting time of all the patients

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A hospital admissions manager took a random sample of 50 patients and found that the mean waiting time of patients was 7.2 minutes. The population standard deviation was known to be 5 minutes.

(a) To calculate the confidence interval, what assumption do we make?

(b) Construct a 90% confidence interval estimate of the mean waiting time of all the patients.

(c) Interpret the confidence interval constructed in (a). Explain if a population mean value of 9 minutes is a reasonable value.

Reference no: EM132973903

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