(Solved): Carbon monoxide (CO) emissions for a certain kind of car vary with mean 2.874g/mi and standard de ...

Carbon monoxide $$(\mathrm{CO})$$ emissions for a certain kind of car vary with mean $$2.874\mathrm{g}/\mathrm{mi}$$ and standard deviation $$0.7\mathrm{g}/\mathrm{mi}$$. A company has 70 of these cars in its fleet. Let $$\stackrel{?}{y}$$ represent the mean CO level for the company's fleet. a) What's the approximate model for the distribution of $$\stackrel{?}{y}$$ ? Explain. b) Estimate the probability that $$\stackrel{?}{y}$$ is between 3 and $$3.1\mathrm{g}/\mathrm{mi}$$. c) There is only a $$1\%$$ chance that the fleet's mean CO level is greater than what value? a) Select the correct choice below and, if necessary, fill in the answer boxes within your choice. A. ANormal model with mean and standard deviation (Round to three decimal places as needed.) B. A Binomial model with trials and a probability of success of (Round to three decimal places as needed.) C. A Poisson model with mean number of successes (Round to three decimal places as needed.) D. There is no model that fits this distribution.