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    vp127381a Posts: 1, Reputation: 1
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    #1

    Oct 7, 2012, 02:59 PM
    find the probability of mean sample would differ from less than
    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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    Unknown008 Posts: 8,076, Reputation: 723
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    #2

    Oct 8, 2012, 10:51 AM
    Show your attempt please.
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