A factory produces plate glass with the mean thickness of 4mm and a standard deviation of 1.1 mm. A simple random sample of 100 sheets of glass is to be measured, and the mean thickness of the 100 sheets is to be computed.

What is the probability that the average thickness of the 100 sheets is less than 4.20mm?

A factory produces plate glass with a mean thickness of 4mm and a standard deviation of 1.1 Type numbers in the boxes mm. A simple random sample of 100 sheets of glass is to be measured, and the mean thickness opodne of the 100 sheets is to be computed. What is the probability that the average thickness of the 100 sheets is less than 4.20 mm? Round your answers to 5 decimal places