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

X

is given by

x	0	1	2	3	4
Px	0.35	0.38	0.19	0.05	0.03

Send data to Excel

Part:0 / 2

0 of 2 Parts Complete

Part 1 of 2

(a) Compute the mean

X

. Round the answer to at least two decimal places.

=X