Mathematics, 25.11.2021 07:50 amiechap12

A company that manufacturers batteries for cell phones wants to estimate the mean number of hours that battery will last. How many batteries must they test to be 95% confident that their mean is within 1.5 hours of the population mean (Assume that the population standard deviation is 3.85)

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A company that manufacturers batteries for cell phones wants to estimate the mean number of hours th...