Friday, December 27, 2013

From the Data to the Super Bowl - Week 17 Power Rankings and Week 16 Recap


Week 16 Recap



Week 16 was a tricky one with upsets and heart-breakers. Last week's predictions were 9 of 16. Vegas was 10 for 16 and the expert was also 9 for 16. Adjustments for recent performance and home field advantage may have been able to improve the predictions.


As we enter the last week of the NFL season the picture becomes even more murky. Posted below are the power rankings for week 17. A few things from this weeks analysis became evident:

Week 17 Notes:

1. This analysis takes the whole season's performance into account. The team that played week 1 is considered the same as the team that played week 16. We all know this is not true based on team dynamics and injuries. The ESPN power rankings are based on recent performance - a lesson that can be learned from (Although I do think the power rankings bias towards larger market teams....I'll prove it). Perhaps for next year I will take into account the prior performance and create a moving average algorithm as the season moves along.

2. Scores matter. You need to win by large margins throughout the season.If you want to be ranked higher than someone you need to beat who they beat by MORE! More is better.

3. Denver being so low makes sense only based on the recent loss to SD and the margins decreasing.

4. One big win by NE does not erase the close games they have lost/won throughout the season to some bad teams (see point 1).

5. SEA still on top even after the loss.

6. I have added last weeks ranking based on feedback I received. Keep the feedback coming!

This weeks predictions to be posted on Saturday!

Week 17 Power Rankings:
 Note: Disagree is denoted by a disagreement of >5 spots between ranking systems.

Last Week This week
Disagree ESPN Ranking
1 1 SEA
SEA
2 2 SF
DEN
5 3 ARI *** CAR
3 4 STL *** SF
12 5 CIN
NE
7 6 CAR
NO
15 7 PHI
CIN
6 8 NO
IND
11 9 PIT *** ARI
8 10 MIA *** KC
4 11 DEN *** PHI
13 12 BAL
SD
10 13 SD
CHI
16 14 TB *** BAL
14 15 DET
DAL
21 16 IND *** MIA
9 17 KC *** GB
18 18 MIN *** PIT
19 19 NE *** STL
20 20 TEN
DET
23 21 JAC *** TEN
17 22 CHI *** NYJ
22 23 ATL
BUF
24 24 BUF
NYG
25 25 CLE
MIN
30 26 GB *** TB
31 27 HOU
ATL
26 28 NYG
CLE
27 29 DAL *** JAC
28 30 WAS
OAK
32 31 NYJ *** WAS
29 32 OAK
HOU

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