Pollution. Carbon monoxide (CO) emissions for a certain kind of car vary with mean 2.9 g/mi and standard deviation 0.4 g/mi. A company has 80 of these cars in its fleet. Let represent the mean CO level for the company's fleet.
a) What's the approximate model for the distribution of Explain.
b) Estimate the probability that is between 3.0 and 3.1 g/mi.
c) There is only a 5% chance that the fleet's mean CO level is greater than what value?