Friday, April 08, 2005
Teaching An Old Dog Some New Tricks
After reading an insightful article (by Studes of Baseball Graphs) about representing data with pictures over at the Baseball Analysts, I decided I better update my routine. I spend a lot of time sifting through numbers, creating tables, etc, so I'm pretty comfortable interpreting data contained in a table, and that's become the standard medium for presenting my information. I hadn't really thought about it, but that's probably not always the best way to go about it.
As an alternative, I'll try and spruce things up with a spiffy graph from time to time. The following picture is probably easier to grasp than just listing PPP numbers for each team in a table. (Note the eerie similarity of this graph to the ones Studes used in the article.)
Interpreting the Graph
Offensive efficiency runs the horizontal axis, so the further a team's dot is to the right, the better their offense was this year. Likewise, the higher the dot, the better the defense. The diagonal lines represent expected winning percentages for a team with a given combination of offensive and defensive efficiencies. For example, a team that scores as many points as it allows (offensive rating = defensive rating) would be expected to finish with a .500 record.
Note - I used the following formula for expected win % -
Expected Win % = Offensive Rating^10 / (Offensive Rating^10 + Defensive Rating^10)
If you're not familiar with the formula, Ken Pomeroy penned a good piece explaining how it works.
Illinois and Michigan State were really head and shoulders above the rest of the league this year. Not only were they the two best offenses, but their defenses were both among the top three.
Despite their 7-9 league record, Iowa played like a slightly-better-than .500 team. They fell short of their expected win % because they lost so many close games. On a side note, Iowa's expected win % during their 12 conference games without Pierce (9 regular season + 3 BTT) was a solid .560, which works out to a 9-7 record over 16 games. Since they bring everyone back next year, there's plenty of reason for optimism for next year's conference season. I'll have plenty more on this soon.
Minnesota's success was largely attributable to their exceptional defense, as their offense was one of the worst in the Big Ten. Minnesota was the opposite of Iowa in that they exceeded their expected win %, as they won several close games. You can usually expect those kind of breaks to even out in the long run, which bodes well for Iowa next year.
Wisconsin was much closer to middle of the pack than they were to MSU and Illinois. Given the number of players returning to Iowa, Indiana, and Ohio State, and the number of seniors leaving Wisconsin, it's conceivable that the Badgers could finish as low as fifth or sixth next year (though I doubt Bo Ryan will let that happen). Right now you're probably saying "Wisconsin not in MSU's league? Doesn't this guy remember Wisconsin making the Elite Eight?" While their tournament run was admirable, don't forget that the only single-digit seed the Badgers faced was North Carolina.
Remember how good Illinois was this year? Historic....season for the ages...etc, etc, right? That's approximately how bad Penn State was this year. With 931 points scored and 1181 points allowed, their expected win % was a laughable 0.085. Illinois's expected win % was 0.906, so you could make a good case that Penn State was worse than Illinois was good this year. Good luck without Aaron Johnson next year.
Purdue was another team that fell short of their expected win %. They actually had a better points margin than Northwestern, despite finishing three games behind the 'Cats. I think you can attribute most of that gap to NW's success in close games, most notably the comebacks against Iowa and Minnesota.
So, what's your take? Do you like the graph, or do you prefer that kind of information neatly tucked into the rows and columns of a table? Comments and emails are always appreciated.
Thursday, April 07, 2005
Waterloo put together a pro basketball team to play in the new International Basketball League. Believe it or not, they convinced Tim Hardaway, he of the killer cross-over of years gone by, to suit up for their team's first game. My basketball attention span has greatly diminished since the end of the NCAA finals on Monday, but this might warrant a road trip.
Iowa's current roster reads like a Who's Who of recent Hawkeye State high school talent, with former stars like Adam Haluska, Jeff Horner, Greg Brunner, Mike Henderson, and Carlton Reed. Waterloo's roster, by comparison, is a collection of who-dat's (gratuitous Wonk reference). Apparently one need only play for a small Iowa college (or a bigger school 5 years ago) to earn a roster spot.
Nevertheless, the league is intriguing. They are strongly emphasizing an up-tempo game - they're using a 22 second shot clock and only allowing each team only one timeout per quarter. For the players, life sounds as tough as that of baseball's lowest level individuals. Guys are playing for about $30 a game and working full-time off the court. Waterloo's coach even has a job apart from the team.
As I may have mentioned in the past, my two spectator sporting obsessions are college basketball and major league baseball. Their mutually exclusive schedules are perfect for my viewing tendancies - Opening Day fell on the same day as the last day of the basketball season, and college games resume just a few weeks after the World Series. This allows me to completely throw myself into each game, but it also means that I pay little attention to anything else besides the sport in season.
Given the above obsession with baseball, and the Minnesota Twins specifically, posting at this blog will be much less frequent than it has been over the past few months. I'll still be writing about past players and teams that interest me, about this year's and next year's Big Ten teams, about the NBA draft in June, about the Primetime League this summer, and anything else that interests me along the way, but you should be able to keep up by simply checking in once or twice a week.
'Til next time......