How often it take more than sixty mins to repair machine
Data from service records shows that the time to repair a certain machine is normally distributed with a mean of 50 minutes and a standard deviation of 5 mins. Estimate how often it will take more than 60 mins to repair a machine.
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Data from service records shows that the time to repair a certain machine is normally distributed with a mean of 50 minutes and a standard deviation of 5 mins.
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