A company produces steel rods. The lengths of the steel rods are normally distributed with a mean of 130.4-cm and a standard deviation of 1.9-cm. For shipment, 7 steel rods are bundled together.

Find the probability that the average length of a randomly selected bundle of steel rods is less than 130.3-cm.

P(M< 130.3-cm) =

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