Question

Dirty air: The federal government has enacted maximum allowable standards for air pollutants such as ozone. Let X be the number of days per year that the level of air pollution exceeds the standard in a certain city. The probability distribution of Xis given by 0 1 2 3 4 P () 0.34 0.39 0.17 0.06 0.04 0.00 0.04 Send data to Excel

Answer 1

Given data. .P(X 3 4 0.34 0-390.1710-06 0.04 c) probability that the standard is exceeded on autteest three days. p(223) = P(X=3) +P(X=4) → P12=3= 0.06 => P(X=40) = 0.04. 12133) = 0.10