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60 mm diameter grinding media

By 2 standard deviations a ball does bearing with adiameterof 58.2mmdiffer from the mean. Step-by-step explanation: It is given thata shipment of racquetballs with a mean diameterof60 mmand a standard deviation of 0.9mmis normally distributed. Absolute difference writtendiameterof 58.2mmand averagediameteris

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