Mathematics, 18.12.2019 23:31 jazzwok
Battery life for a hand-held computer is normally distrituted and has a population standard deviation of 8 hours. suppose you need to estimate a confidence interval estimate at the 80% level of confidence for the mean life of these batteries. determine the sample size required to have a margin of error of 0.332 hours. round up to the nearest whole number
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Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?
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