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The quality control manager at a computer manufacturing company believes that the mean life of...

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The quality control manager at a computer manufacturing company believes that the mean life of a computer is 88 months with a variance of 81 If he is correct what is the probability that the mean of a sample of 84 computers would differ from the population mean by less than 1 39 months Round to four decimal places Answer 2 Tables your answer Keypad

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