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The weights of envelopes sent from an insurance office are

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The weights of envelopes sent from an insurance office are normally distributed with mean = 12 ounces and standard deviation of 3.7 ounces. The mail room clerk would like to know the average weight of 20 envelopes. What is the probablilty that the mean weight x is heavier than 13 ounces

Reference no: EM13618408

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