Time in surgery: Records at a hospital show that a certain surgical procedure takes an average of 172.6 minutes with a standard deviation of 8.5 minutes. If the data are approximately bell-shaped, between what two values will about 68% of the data fall? About 68% of the data will fall between and .

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A: Solution: The mean of Y is

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A: Mean:The formula for finding mean is shown below:

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A: Given

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A:

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A: