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.
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