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A company produces steel rods. The lengths of the steel rods are normally distributed with a...

A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 237.4-cm and a standard deviation of 1.6-cm. For shipment, 6 steel rods are bundled together.

Find the probability that the average length of a randomly selected bundle of steel rods is between 237.5-cm and 239.1-cm.
P(237.5-cm < M < 239.1-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.

Math   Statistics-And-Probability   
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