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A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 249.5-cm and a standard deviation of 2.1-cm. For shipment, 11 steel rods are bundled together. Find the probability that the average length of a randomly selected bundle of steel rods is between 250.6-cm and 251.5-cm. P(250.6-cm < M < 251.5-cm) =

- October 10, 2022 - Edwin Tunner

A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 249.5-cm and a standard deviation of 2.1-cm. For shipment, 11 steel rods are bundled together.

Find the probability that the average length of a randomly selected bundle of steel rods is between 250.6-cm and 251.5-cm.
P(250.6-cm < M < 251.5-cm) = 

Enter your answer as a number accurate to 4 decimal places. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.

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