Calculate the average premium pay on life insurance policies

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Question: A random sample of 25 life insurance policyholders showed that the average premium they pay on their life insurance policies is $685 per year with a standard deviation of $74. Assuming that the life insurance policy premiums for all life insurance policyholders have a normal distribution, make a 99% confidence interval for the population mean, μ.

Reference no: EM131679893

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