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NFL Football Players Draft Injuries Rookies Season SuperbowlPublished: January 6, 2010
Rozelle said that ultimate parity comes when everyone finishes 8-8—meaning no separation between teams in the standings.
Statistics give us a perfect, easy-to-find measurement to gauge the separation in teams' standings. We simply use the standard deviation (STDEV) between the teams' win totals.
Standard deviation measures the average distance between a set of numbers. For 2009, the standard deviation between NFL teams was 3.22 wins.
When it comes to this figure, lower is better. The lower the difference between the teams, the more competitive the league.
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Article Source: BleacherReport.com