About 3 in 10 Americans fit the NAE / LifeWay statistical definition of what would count as evangelical by belief. (christianitytoday.com)
It attempts to offer a statistical definition of the direction of causation. (sciencedaily.com)
The important concept is that a statistical definition of «usual» is being within two standard deviations of the average, or within 34 % in this case (fool.com)