Pollution Carbon monoxide (CO) emissions for a certain kind of car vary with mean 2.9 g>mi and standard devia-tion 0.4 g>mi. A company has 80 of these cars in its fleet. Let y represent the mean CO level for the company’sfleet.a) What’s the approximate model for the distribution of y?Explain.b) Estimate the probability that y is between 3.0 and3.1 g>mi.c) There is only a 5% chance that the fleet’s mean COlevel is greater than what value?

Functions and Change: A Modeling Approach to College Algebra (MindTap Course List)
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ISBN:9781337111348
Author:Bruce Crauder, Benny Evans, Alan Noell
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Pollution Carbon monoxide (CO) emissions for a certain
kind of car vary with mean 2.9 g>mi and standard devia-
tion 0.4 g>mi. A company has 80 of these cars in its fleet.
Let y represent the mean CO level for the company’s
fleet.
a) What’s the approximate model for the distribution of y?
Explain.
b) Estimate the probability that y 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?
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