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Confidence interval for the population mean service time

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DBS Bank in Central has opened a new technical support call center to help customers in using their e-banking app. In order to estimate the population mean service time, 1, the manager has selected a random sample of 64 calls and found the average service time is 100 minutes with s = 4.5 minutes.

(a) What is the 95% confidence interval for the population mean service time?

(b) Interpret the interval in (a), either in language to non-expert or using statistical interpretation.

Reference no: EM132495335

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