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15. A machine produces bolts whose diameters follow a bell-shaped distribution with an average diameter of 0.25 inches and a standard deviation of 0.02 inch.

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15. A machine produces bolts whose diameters follow a bell-shaped distribution with an average diameter of 0.25 inches and a standard deviation of 0.02 inch. A. Determine whether this is discrete, binomial, or normal. B. Find the probability that a bolt will be produced with a diameter greater than 0.28 inch? P(x > 0.28) = ?_

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