The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.3 inches. what is the probability that the average length of

The population of lengths of aluminum-coated steel sheets is normally distributed with a mean of 30.05 inches and a standard deviation of 0.3 inches. what is the probability that the average length of a steel sheet from a sample of 9 units is more than 29.95 inches long?