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6. An automotive repair shop has determined that the average service time on an automobile is 130 minutes with a standard deviation of 26 minutes.

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6. An automotive repair shop has determined that the average service time on an automobile is 130 minutes with a standard deviation of 26 minutes. A. random sample of 40 automotive services is selected. a) Find the mean of the sampling distribution of x. b) Find the standard deviation of x . c) Find the probability that the sample mean does not exceed $136

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