>In fact, in discussing this further with Keith, who originally posted >this piece of information about a month ago, he explained to me that >in the RPI, the "real" weight of WP works out to be about 4.57, while >that of OWP & OOWP combined is about 2.42. > >This can be determined by the following (again, as told to me by Keith): > >4.57 = (0.25 * standard deviation of WP) >2.42 = ((0.50 * std dev of OWP) + (0.25 * std dev of OOWP)) > >where 0.25 = RPI weight of WP, 0.50 = RPI weight of OWP, 0.25 = RPI >weight of OOWP. Just some notes to add: these standard deviations are from last year's data. The standard deviations will be (slightly) different this year, but probably not significantly so. Also note that these are the *hockey* SDs--b-balls numbers might very well be (significantly) different. Also, comparing standard deviations is not the only way to evaluate the weights of the Rating Percentage Index. But I checked with a *real* statistician who specializes in ranking systems, and he said it has some validity. Keith