It considers only games against Division I opponents. Element 1: Team's Winning Percentage. For purposes of this Element, the formula treats a tie as half a win and half a loss. The formula for Element 1 is:. Games determined by penalty kicks are considered ties. Element 1 tells only Team A's wins and ties compared to its games played. It tells nothing about the strength of Team A's opponents. Thus, as an example, Element 1 for a team with an record against the top 20 Division I teams will be.
Element 2 measures a team's opponents' average winning percentage against teams other than Team A. To determine Team A's opponents' average winning percentage, the NCAA first computes, for each of Team A's opponents, the opponent's wins and ties as compared to the opponent's total games played, in the same way it does the calculation for Team A's Element 1. Thus this first part of the computation determines each opponent's Element 1 based on games played against teams other than Team A.
So, if Team A played an opponent once and defeated that opponent, the portion of Element 2 of Team A's RPI attributable to that opponent is determined by the following formula, in which O stands for "Opponent's":. Note that in the denominator, 1 is subtracted from the Opponent's losses. Likewise, if Team A tied the Opponent, the portion of Element 2 attributable to that Opponent is determined by the following formula:.
Once the NCAA does this calculation for each opponent, it then computes the average of the numbers so computed for all of Team A's opponents. Note that the NCAA does not simply add up the different opponents' wins, losses, and ties and then do a single calculation of wins and ties in relation to games played.
Rather, it does a calculation for each opponent and then averages the results. The NCAA uses this averaging method to take into account the fact that different opponents play different numbers of games: By averaging, the NCAA assures that each opponent's contribution to Team A's Element 2 is weighted the same as each other opponent's contribution.
Also, if Team A plays multiple games against an opponent, then the opponent's winning percentage against teams other than Team A is counted multiple times in determining Team A's opponents' average winning percentage.
Element 3 of the RPI measures a team's opponents' opponents' average winning percentage using, for each Team A opponent, the same method to determine that opponent's opponents' winning percentage as used in computing Team A's Element 2. Calculation of RPI. Once the NCAA has calculated each of these Elements, it combines them to determine the variously called "basic" or "normal" or "original" or "unadjusted" RPI. The formula for determining the Unadjusted RPI is:.
In effect , however, this is not true. The following table shows why:. This table shows, for each year, the high and low of each of the three RPI elements. It then shows the difference spread between the high and low for each element. The bottom row of the table shows the averages for the element highs and lows, the element spreads, and the element effective weights. As the table shows, the spreads for the three elements grow smaller when progressing from Element 1 to Element 3.
The reason for the diminishing spreads is obvious, if one thinks about it. The computation of Element 1 looks at one team's record. Individual teams' records reasonably can range from undefeated an RPI Element 1 of 1. For Element 2, the computation looks at about 19 teams' records and averages them out. Teams, on average, play about 19 games in a season. With this many teams' records being used for Element 2, nearly all of the teams are going to have some wins and some losses, so the high Element 2 is going to be less than 1.
Similarly, for Element 3 the computation looks at about 19 x 19 teams' records. This inclusion of a very large number of teams' records produces Element 3 numbers that are even less at the extremes than for Element 2, making Element 3's maximum reasonable and average spread smaller than for Element 2 and much smaller than for Element 1.
Element 1: Element 2: Element 3: If you are having trouble understanding this, think of fruit salad. To do that, I compare the fruit sizes and figure out that the right ratio of ingredients is 1 cantaloupe to 2 oranges to 1 kiwi fruit.
Winning percentage Factor I only receives a 25 percent weighting although its real strength is larger. Thu, Nov 18 pm. Little Rock. Arkansas Baptist Coll. Southern U. Iowa Wes. Wichita St. Tarleton St. Old Dominion. James Madison.
San Diego. San Diego St. Arizona St. Sacred Heart. Robert Morris. Miami Ohio. UC Davis. UC Irvine. La Verne. Wake Forest. Charleston So. Iowa St. Alabama St. NC State. West Virginia. Chicago St. Loyola Chi. Boston College. George Mason. Utah St. Wright St. Holy Cross. Montana St. Stony Brook. Colorado Coll. Norfolk St. Santa Clara. UC Riverside. La Sierra. Youngstown St. Fri, Nov 19 pm. Thomas MN. Washington St.
UC San Diego. SD Christian. Jarvis Chr. Knox College. Kennesaw St. Texas So. Coppin St. Indiana St. Mt St Mary's. Air Force. Mid-Atlantic Christian. Ohio St. Bowling Green. Ole Miss. Oral Roberts. Seton Hall. Rhode Island. New Mexico. Grand Canyon. Prairie View. SF Austin. North Dakota. Morehead St. UT-Rio Grande Valley. Paul Quinn. Kent St. High Point. Notre Dame. NC Central. North Florida. The league could reportedly release its findings from the investigation in the future.
The running back's son's advice was spot on following Peterson's first game with Titans. It's that scoreline again. Home College College Basketball.
SI Recommends. Carius leads W. By Andrew Gastelum. By Brian Straus. By Avi Creditor.
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