. The Empirical Rule The distribution of the length of bolts has a bell shape with a

Chapter 9, Problem 30

(choose chapter or problem)

. The Empirical Rule The distribution of the length of bolts has a bell shape with a mean of 4 inches and a standard deviation of 0.007 inch. (a) About 68% of bolts manufactured will be between what lengths? (b) What percentage of bolts will be between 3.986 inches and 4.014 inches?

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