Talk:Morton High School (Morton, Illinois)

How far back does the "average class size" go?
According to this link, the 2009 class is 10 times the size of the average listed in the article. I can understand it going back a long way, but back to when the school can just one grad? Any school wouldn't have an average that reflects current attendance. For that, you need a "decaying average." In such an average, you discount older data points by multiplying them times a fraction between 0 and 1. The older the point, the less the the weight used. Will (Talk - contribs) 10:05, 21 May 2009 (UTC)