Confidence interval for the population mean

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An analyst is conducting a hypothesis test to determine if the mean time spent on investment research by portfolio managers is different from 3 hours per day. The test uses a random sample of 64 portfolio managers, where the sample mean time spent on research is found to be 2.5 hours. The population standard deviation is 1.5 hours. What is the 99% confidence interval for the population mean time spent on investment research by portfolio managers?

Reference no: EM132495360

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