A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 103.4-cm and a standard deviation of 0.9-cm. For shipment, 12 steel rods are bundled together. Find...

A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 103.4-cm and a standard deviation of 0.9-cm. For shipment, 12 steel rods are bundled together.


Find the probability that the average length of a randomly selected bundle of steel rods is between 103.2-cm and 104.1-cm.

P(103.2-cm M < 104.1-cm)="">

Enter your answer as a number accurate to 4 decimal places.