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The diameter of a brand of tennis balls is approximately normal distributed, with a mean of 2.56 inches and a standard deviation of 0.05 inch.

The diameter of a brand of tennis balls is approximately normal distributed, with a mean of 2.56 inches and a standard deviation of 0.05 inch. A random sample of 12 tennis balls is selected. Please complete d

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(Round to four decimal places as needed.) c. What is the probability that the sample mean is between 2.54 and 2.57 inches? P(2.54

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