The following data represent the number of touchdown passes per season thrown by the Benedict Arnold of the National Football League, Brett Favre (can you tell I’m a diehard Green Bay Packer fan?), during his first 18 seasons.

0   18   19   33   38   39   35   31   22

20   32   27   32   30   20   18   28   22

Verify that Chebyshev’s Theorem holds true by determining the percent of observations that fall within + two and three standard deviations from the mean.