the mean life of a computer is 81 months with a variance of 81. What is the probability that the mean of a sample of 89 computers would differ from the population mean by less than 0.85 months
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the mean life of a computer is 81 months with a variance of 81. What is the probability that the mean of a sample of 89 computers would differ from the population mean by less than 0.85 months
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