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Statistically Speaking: WAC Look-Ahead: SDPI

Tuesday, March 25, 2008

WAC Look-Ahead: SDPI

One of my favorite set of posts from last offseason was the conference recap using SDPI. SDPI is a statistic I borrowed from Eddie Epstein that he used in his book, Dominance, to rank pro football's all-time greatest teams. SDPI stands for Standard Deviation Power Index and looks at how teams performed relative to the league average (or conference average in this case) and standard deviation in terms of points scored and allowed. The more standard deviations a team is above the mean, the better they are, and vice-versa. Here is the link to last year's WAC post. As you can see, SDPI was a useful tool in predicting some of the rise and fall among the WAC's teams. In the interest of providing an even better offseason analysis, I will now be conducting another SDPI, this time for yardage. It is calculated in the same manner as the SDPI for points, but will obviously be measured against the conference mean and standard deviation for yards. Think of it this way: Points are the end result and yards are the means to that end. Thus, looking at both sets of data, we can get an even better idea about which teams are likely to improve or regress in 2008.

If you want the meat of the article, skip this next paragraph as it just gives an example of how the SDPI is calculated. The mean points scored and allowed for all WAC teams in conference play was 246.33 points. The standard deviation for points scored was 81.18. The standard deviation for points allowed was 46.96. Louisiana Tech scored 199 points in WAC play and allowed 237. Their offensive SDPI was -0.58 = ([199-246.33]/81.18). Their defensive SDPI was 0.20 = ([246.33-237]/46.96). Their total SDPI for points (SDPIP) was -0.38 which ranked 6th in the conference. The mean yardage for and against for all WAC teams in conference play was 3342.33 yards. The standard deviation for yardage for was 631.76. The standard deviation for yards allowed was 339.76. Louisiana Tech gained 3119 yards in conference play and allowed 3430. Their offensive SDPI was -0.35 = ([3119-3342.33]/631.76). Their defensive SDPI was -0.26 = ([3342.33-3430]/339.76). Their total SDPI for yards (SDPIY) was -0.61 which ranked 5th in the conference.

To refresh your memory, here are the 2007 WAC Standings.

Now here are the 2007 SDPI standings.

The actual standings are pretty in line with the SDPI standings. Hawaii and Boise State dominated their WAC foes in 2007. As we'll see later, that's par for the course for the Broncos. Fresno State's third place finish in SDPIP aligns pretty well with their third place in the actual standings, but in SDPIY, they were actually sixth--ahead of only rif-raf Idaho, New Mexico State, and Utah State.

Best Offense: Boise State 1.71 (SDPIP), Hawaii 1.41 (SDPIY)
The Bronocs scored the most points in WAC play, and the Warriors gained the most yards. Boise State has led the WAC in scoring in 5 of their 7 years in the league.

Worst Offense: Idaho -1.00 (SDPIP), Utah State -1.50 (SDPIY)
The Vandals and Aggies staged an epic pillow fight in the last game for both teams--a 24-19 Aggie win in the Kibbie Dome on November 24th.

Best Defense: Boise State 1.43 (SDPIP) and 1.45 (SDPIY)
Nevada and Hawaii combined to gouge the Broncos' defense for 1213 yards. The other 6 WAC schools managed only 1638.

Worst Defense: New Mexico State -1.50 (SDPIP), Utah State -1.29 (SDPIY)
It should come as no surprise that both Aggie squads combined to go 3-13 in WAC play.

Looking ahead to next season, the prohibitive favorite should be...

not Fresno State
Pat Hill's Bulldogs will likely be getting a lot of love in the preseason magazines after closing with victories over Kansas State and Georgia Tech sandwiched around a win over New Mexico State. And why not lavish the Bulldogs with the title of 'Team to Beat'. Quarterback Tom Brandstater is back for his senior season, 2/3rds of the running back committee return, 5 of 6 players who caught more than 10 passes are back, and the offensive line in nigh intact. What's not to love? For starters, the team's leading tackler and defensive leader, linebacker Marcus Riley is gone, as is the leading sacker, Tyler Clutts. Secondly, the Bulldogs statistics point to a middling WAC team looking to take a step toward the top of the league, not a team already at the precipice looking down on their opponents. Fresno State finished 6th in the WAC in yards per game and 7th in yards allowed per game last season. They were outgained on average by about 55 yards per game. That number is not artificially inflated by their losses to Boise State and Hawaii. They were outgained in 6 of their 8 conference games (Louisiana Tech, Nevada, Idaho and San Jose State were the other 4). Thirdly, Pat Hill, despite his great success in Sillicon Valley, has never won the WAC. And finally, Boise State. Here's what the Broncos have done to WAC teams on the Smurf Turf since joining the conference in 2001.In 7 years the Broncos have been in the WAC, they have played 3 one-score games at home. They defeated Tulsa 27-20 in 2003, Hawaii 41-34 in 2006, and Nevada 69-67 in OT this past season. The Bulldogs must travel to Boise this season, so in all likelihood, the Broncos will have the tiebreaker over the Bulldogs if it comes to that.

The team(s) that will improve are...

Nevada
With the massive personnel losses in Hawaii, the unsettled quarterback situation coupled with the loss of stellar tackle Ryan Clady at Boise State, and the aforementioned issues at Fresno State, the real darkhorse in the 2008 WAC race is the Nevada Wolfpack. Last season the Wolfpack had the second most prolific offense (in terms of yardage) and the third best defense in the WAC. The 'Pistol' offense should be quite prolific once again and could blow up big time. Quarterback Colin Kaepernick exploded onto the scene with a dazzling freshman year. Kaepernick averaged almost 9 yards per pass (8.8) and threw 19 touchdowns against just 3 interceptions. He also gained 593 yards on the ground, making him a poor man's Tim Tebow. If he can improve his completion percentage (53.8%), he could take another step forward and perhaps set himself up as a sleeper Heisman candidate in his junior and senior seasons. The top receiver (Marko Mitchell) and rusher (Luke Lippincott) are also back as well as 4 starters from the offensive line. The Wolfpack do lose 3 of their top 4 tacklers plus their best defender, linebacker Nick Fuhr, but the offense should make up for most of the shortcomings of the defense and keep the Wolfpack in the conference race. With non-conference games against Texas Tech and Missouri, don't be surprised if most observers have written off the Wolfpack in mid-September, only to have a late November home game against Boise State decide the WAC Championship.

The team(s) that will decline are...

Hawaii
June Jones. Gone. Colt Brennan. Gone. Quartet of fantastic receivers. Gone. Tyler Graunke proved himself to be an admirable replacement for Brennan last season, but the Warriors' offense will experience some growing pains in 2008. The schedule is pretty tough too. The Warriors must face Boise State and Fresno State on the road in WAC-play, but that's not the worst of it. The Warriors open the season in Gaineville against the Gators, a game that should be uglier than the Sugar Bowl debacle. Two weeks later they travel to Corvallis to take on Oregon State. Finally, the Warriors close the regular season at home against Washington State and Cincinnati. Getting back to a bowl game would be a big accomplishment for Greg McMackin in his first year on the job.

Time to Bury Mumme Ball?
In 3 seasons in Las Cruces, Hal Mumme has posted an 8-29 record (3-21 in WAC play). 4 of those 8 wins have come over teams that do not play Division IA football. Mumme was given a pass in his first season, an 0-12 debacle, because he didn't have his players. In 2006, quarterback Chase Holbrook, who followed Mumme from SE Louisiana, became eligible and the Aggies finished 3rd in the WAC in yards per game. Big things, or at least a bowl game, were expected in 2007, but the Aggies struggled mightily. Mumme's offense was actually below average in WAC games, finishing 5th in the league in yards per game, about 19 yards fewer then the 'average' WAC team. New Mexico State has some positive indicators heading into 2008. Their turnover margin, second to last in league play at -5, is chief among them. It also stands to reason that Mumme's offense and Holbrook in particular (he is entering his senior season) could improve and lead the team to a bowl game. Still, SDPI ranks the Aggies 8th in one measure (yards) and 9th or dead last in another (points), so the Aggies have a long way to go. If the Aggies don't get to a bowl game, it may be time to cut ties with Mumme. He's done much worse so far than his predecessor, Tony Samuel, did in his final 3 seasons.

9 Comments:

Anonymous Anonymous said...

I think you need to do more research on NMSU, because NMSU did have a good team last season, but injuries killed us. I guess you didn't look that we lost our best WR Chris Williams who missed the last five games. The last game NMSU was fully healthy was against UTEP when NMSU beat them. NMSU lost Chase Holbrook for a few games, and he missed the LT which saw NMSU lost by a few points. NMSU would of won that game if we had Chase. NMSU didn't play well the last few games, because there was nothing to play for, but if NMSU would of beat LT, and got by Nevada who we lost by 3 pts after we missed a field goal NMSU would of had 6 wins going into the Utah State game, and I'm pretty sure we would of beat them if we had something to play for. NMSU lost 11 starters for 33 games last season, and APR has hit Mumme hard, so I don't think Mumme is on the hot seat, because he has been avg about 16 recruits the past 3 years, because of APR hits from the previous coach. To me it sounds like you don't know a damn thing about College Football, so open your fucking eyes, and do your fucking research or don't fucking post at all. Do you got that. NMSU is going to be a very good team this year. NMSU signed two guys who run 4.3 40s to add with Chris Williams. NMSU is going to have a very scary offense this season, and defense should be improved with our new DC. So next time do your research ok dude.

10:20 AM  
Anonymous Anonymous said...

I would also like to point out that Mumme had 10 graduating in the 07 season, something Samuels never achieved. One thing Mumme promises parents--they will get an education and the field comes second. Since very few college football players go to the next level, I think that is a most admirable position for Mumme to take. I can't recall how many of the seniors are graduating this year but it is a notable number. I agree with your article...our defense was pitiful (coaches or players???) we had a lot of injuries that were possibly caused from a lack of depth. That has been corrected for this season and the new DC has the defense very hyped up. I think the Aggies will be an exciting team to watch this year. GO AGGIES

11:19 AM  
Blogger matt said...

Nothing about NMSU was good last season. Chris Williams did miss the last 5 games, but the team actually averaged more yards per game without him. In the first 8 games (2 against IAA schools) the Aggies averaged 410 yards per game. In the last 5 games they averaged 444. As the old adage goes, injuries are a part of the game.

You also point out some of NMSU's near misses--against Louisiana Tech and Nevada specifically, yet you fail to mention that they scraped by UTEP 29-24 and barely edged IAA Arkansas Pine Bluff 20-17. You are correct, if everything went the Aggies way last year, they would have been bowl eligible, but it's not like they had terrible luck.

This season the Aggies will be a middle of the pack team with a good offense and a bad defense. If they win the swing games and don't blow any they shouldn't, they will go bowling, but that's much easier said than done.

6:33 PM  
Anonymous Anonymous said...

Umm anonymous...
To me you sound a little insane. Either that or you must be one of the guys who just signed with NMSU.
I frequently view leftyloon's blog and have found it to be quaint, enjoyable, and interesting.
When I read what you wrote, you just seem like a big meanie.
You are writing like a big baby who just doo dood in his pants.
If you don't like leftyloon, don't read him. Nobody cares.
And I happen to agree with him that NMSU needs a new coach fast or atleast players who don't get hurt and act like girls. You know, you should go out for the team. You'd fit right in jerk.

6:00 AM  
Blogger FSDogs1 said...

Although I can tell you did a lot of looking into the stats, it's also obvious you didn't look much past the surface. I'm a Fresno State fan, so I can help a little with this.

You mentioned how Nevada and SJSU for instance outgained the 'Dogs last year. But if you saw the Nevada game you'd know it was an absolute blowout on the road and Nevada stockpiled all its yards in the second half against mainly Fresno State's third-stringers. As for the SJSU game, talk all you want about yardage and stats, but Fresno State won 30-o. Thirty to nothing!

Fresno State is not a statistical team, never has been. Pat Hill doesn't care about stats or scoring points. He only cares about winning. Hill is VERY anti running up the score, unlike Hawaii's June Jones was and Boise State has been in the past with certain teams. You were also incorrect about Hill never winning the WAC, he won a share of the title in 1999.

Say the 'Dogs shouldn't be conference favorites if you want, but you need better support than some empty statistical analysis...

www.BulldogBounce.blogspot.com

11:18 AM  
Blogger matt said...

Thanks for checking the facts for me. I apologize, I forgot about Fresno's co-Wac title in 1999.

As for 'empty' stats, I'd say yards and points are two of the most replete stats there are. You say Fresno State is not a 'statistical' team. I'm not sure what that means. Every team accumulates stats and those stats tell us a great deal about that team. In 2005, fresno was a statistical team. They finished 6-2 in WAC play and ougained conference opponents by over 1100 yards in 8 games (138 per game). Those numbers seem pretty indicative of their actual record. In 2007, the fact that Fresno State gained more yards in WAC play than only 3 teams (Louisiana Tech, Idaho, and Utah St) and allowed more yards than all but 2 teams (New Mexico St and Utah St) is pretty significant. They were outgained by 443 yards in 8 conference games (about 55 per game). Schedule strength isn't a factor since everybody plays everybody else.

Stay tuned, I have a special interest in statistical anomalies like Fresno--bad yardage differential and solid point differential--, and plan on analyzing similar teams in the recent past to see how they fared the following season.

5:42 PM  
Anonymous Anonymous said...

Does your statistical analysis incorporate ST into the equation? Fresno State had the top KR and one of the top PR in the nation last year...

10:07 PM  
Anonymous Anonymous said...

Your spot on about Hal Mumme. He does do an excellent job of displaing his extraordinary hairstyle, but he is weak on substance. His program reminds me of June Jones early days, trying to run a conrarian offense with contrarian, in the shitty sense, players. The difference is kids with criminal records want to go to Paradise, i. Hawaii, but they don't want to go to New Mexico to play in front of their inbred fans who spew illogical vnom like a clydsdale horse shits.

2:30 PM  
Blogger matt said...

It does not incorporate special teams. Offense and defense are better predictors of continued success, while special teams performances are highly veriable, eespecially between seasons.

3:53 PM  

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