Question

A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 165.4-cm and a standard deviation of 1.5-cm. For shipment, 18 steel rods are bundled together.

Find P49, which is the average length separating the smallest 49% bundles from the largest 51% bundles.
P49 = -cm

Enter your answer as a number accurate to 2 decimal place. Answers obtained using exact z-scores or z-scores rounded to 3 decimal places are accepted.

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