This week at the New York Times, a look at the incredible run the Seahawks are on when it comes to preventing points:
In addition, while Seattle has allowed an average of 15.7 points per game over the last four years, only one other team since 2012 has allowed fewer than 20 points a game on average over that same period. That team, the Cincinnati Bengals, at 19.5, has still allowed nearly 4 more points per game than the Seahawks. In other words, what really distinguishes this Seattle team is how far ahead of the rest of the N.F.L. it has been in this statistic.
One way to measure this is by measuring the number of standard deviations from average. Over the last four years, Seattle has allowed 15.73 points a game, relative to the league average of 22.89. The standard deviation in points allowed by the league’s 32 teams over this period has been 2.62 points per game. This means Seattle, which has been over 7 points a game better than average, has been 2.73 standard deviations better than average, a statistic known as a Z-score.
You can read the full article here.