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CH 7 QUESTION 22 Steel rods are manufactured with a mean length of 25 centimeter (cm). Because of variability in the manufacturing process, the lengths

CH 7 QUESTION 22

Steel rods are manufactured with a mean length of 25 centimeter (cm). Because of variability in the manufacturing process, the lengths of the rods are approximately normally distributed with a standard deviation of 0.09 cm.

(a) What proportion of rods has a length less than 24.8 cm?

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