A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 198.4-cm and a standard deviation of 2.2-cm. For shipment, 18 steel rods are bundled together.

Find the probability that the average length of a randomly selected bundle of steel rods is greater than 199.9-cm.

P(M> 199.9-cm) =

Enter answer as a number accurate to 4 decimal places. Answers obtained using exactz-scores orz-scores rounded to 3 decimal places are accepted