Suppose that the population standard deviation is unknown


According to the UK All Green and Bowling Association, male retirees spend an average of 15 hours of bowling per week. Suppose you are given a sample of 100 male retirees and that the population variance is 25. ) Suppose that the population standard deviation is unknown. If 8% of all sample means are smaller than 13 and the population mean is still 15, what is the value of the standard deviation?

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Finance Basics: Suppose that the population standard deviation is unknown
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