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Old 11-19-2006, 12:38 AM   #1 (permalink)
Ganchrow
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Default Estimated NBA ATS Push Frequencies

For updated data please see my Half-Point Calculator.

Spread N Freq. Std. Err.
1 6,510 2.29% 0.19%
2 8,059 3.92% 0.22%
3 9,476 3.84% 0.20%
4 10,330 3.50% 0.18%
5 10,286 4.30% 0.20%
6 9,626 4.11% 0.20%
7 8,679 4.09% 0.21%
8 7,563 4.17% 0.23%
9 6,273 4.69% 0.27%
10 5,119 4.12% 0.28%
11 4,098 4.05% 0.31%
12 3,163 3.48% 0.33%
13 2,397 3.84% 0.39%
14 1,811 3.37% 0.42%
15 1,277 3.13% 0.49%
16 850 5.18% 0.76%
17 509 3.14% 0.77%
18 286 3.15% 1.03%
19 162 3.09% 1.36%

Methodology:
  • All NBA final scores and closing point spreads (from http://www.covers.com/) from the 1990/1 season through November 2th of the 2008/9 season were analyzed (21,847 games in total) for various favorite margins of victory.
  • The push frequency for a given point spread was determined by the percentage of games with a closing spread within 2 points of the spread in question ending with a favorite margin of victory equal to that spread. For example, the push frequency of a spread of 3 was determined from all games with a closing spread between 1 and 5.
  • This is based on Stanford Wong's methodology as described in Sharp Sports Betting.
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Old 11-19-2006, 12:53 AM   #2 (permalink)
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Default Estimated NBA Over/Under Push Frequencies

For updated data please see my Half-Point Calculator.

Total N Freq.
170 548 2.37%
171 713 3.51%
172 869 2.53%
173 1,031 2.52%
174 1,202 2.25%
175 1,375 2.69%
176 1,563 2.18%
177 1,760 2.44%
178 1,960 2.40%
179 2,187 2.70%
180 2,348 2.21%
181 2,586 2.09%
182 2,819 3.23%
183 3,086 2.79%
184 3,379 2.78%
185 3,626 2.48%
186 3,842 2.19%
187 4,005 2.22%
188 4,123 2.38%
189 4,322 2.31%
190 4,432 1.96%
191 4,570 2.23%
192 4,600 2.33%
193 4,589 2.31%
194 4,580 2.16%
195 4,519 2.43%
196 4,432 2.62%
197 4,293 2.63%
198 4,152 1.93%
199 4,127 2.42%
200 4,029 2.08%
201 3,917 1.79%
202 3,814 2.60%
203 3,715 2.45%
204 3,636 2.50%
205 3,514 2.19%
206 3,372 2.28%
207 3,168 2.37%
208 2,943 2.14%
209 2,723 2.13%
210 2,531 2.69%
211 2,292 2.14%
212 2,087 2.30%
213 1,926 2.02%
214 1,741 1.78%
215 1,598 2.00%
216 1,447 1.80%
217 1,261 2.14%
218 1,134 2.03%
219 986 1.52%
220 884 2.60%
221 779 2.05%
222 685 1.46%
223 598 2.34%
224 522 3.07%

Methodology:
  • All NBA regular season final scores and closing over/unders (from http://www.covers.com/) from the 1990/1 season through November 17th of the 2006/7 season were analyzed (18,368 games in total) for various total point scores.
  • The push frequency for a given over/under was determined by the percentage of games with an over/under within 4 points of the over/under in question ending with a total point score equal to that over/under. For example, the push frequency of an over/under of 200 was determined from all games with a closing over/unders between 196 and 204.
  • This is based on Stanford Wong's methodology as described in Sharp Sports Betting.
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Old 11-19-2006, 09:28 AM   #3 (permalink)
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Great work as usual. Many thanks.

Is it a simple matter to report on margins of victory in those same games? I can imagine how it might not be -- but if it is, I for one would be happy to see it.
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Old 11-19-2006, 11:55 AM   #4 (permalink)
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Quote:
Originally Posted by Jay Edgar
Is it a simple matter to report on margins of victory in those same games?
Not sure I understand what you mean by this, Jay.

Could you clarify?
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Old 11-19-2006, 11:14 PM   #5 (permalink)
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I didn't phrase it very well. Should have asked about "margin of victory in all NBA games in that time period."

Meant to ask this: without regard to the spread, what % of all games "land on 1" (the winning team's straight-up margin of victory is 1 point). What % of games "land on" 2, and 3, etc?

I'm routinely living in terror of a 1 point win by the team I chose to back at -2 rather than with the ML, etc. So it'd be nice to see a full MOV picture to get a sense of how many games that are in doubt in the last minute (say, MOV of 7 or less) actually land on 1 or land on 2.
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Old 11-19-2006, 11:52 PM   #6 (permalink)
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MOV Freq.
1 4.214%
2 6.131%
3 5.820%
4 5.788%
5 6.327%
6 6.212%
7 6.245%
8 6.043%
9 5.869%
10 5.031%
11 4.797%
12 4.236%
13 3.800%
14 3.267%
15 2.995%
16 2.700%
17 2.428%
18 2.161%
19 1.960%
20 1.846%
21 1.677%
22 1.421%
23 1.024%
24 1.187%
25 0.985%
26 1.007%
27 0.730%
28 0.626%
29 0.550%
30 0.479%
31 0.343%
32 0.414%
33 0.338%
34 0.207%
35 0.180%
36 0.136%
37 0.109%
38 0.103%
39 0.131%
40 0.098%
41 0.060%
42 0.049%
43 0.027%
44 0.049%
45 0.044%
46 0.038%
47 0.027%
48 0.022%
49 0.011%
50 0.005%
51 0.005%
52 0.011%
53 0.005%
56 0.011%
58 0.005%
62 0.005%
65 0.005%
68 0.005%


All NBA regular season scores from the 1990/1 season through November 17th of the 2006/7 season (available from http://www.covers.com/) are included (18,368 games in total).
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Old 11-20-2006, 12:08 AM   #7 (permalink)
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Jeez, Ganch, we could time you with a sundial. 38 minutes!!!

Seriously, many thanks.
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Old 11-20-2006, 12:10 AM   #8 (permalink)
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Quote:
Originally Posted by Jay Edgar
Jeez, Ganch, we could time you with a sundial. 38 minutes!!!

Seriously, many thanks.
Well to be fair, I didn't actually see your last post until 11:40 ...
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Old 11-20-2006, 01:27 PM   #9 (permalink)
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Was there really an NBA game decided by 92 points in the last 15 years?

(I'm sure that if someone identifies it the rest of us will say, "Oh yeah, I remember that.")
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Old 11-20-2006, 01:45 PM   #10 (permalink)
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Quote:
Originally Posted by Jay Edgar
Was there really an NBA game decided by 92 points in the last 15 years?

(I'm sure that if someone identifies it the rest of us will say, "Oh yeah, I remember that.")
Unless Detroit really beat Seattle by a score of 92-0 on March 10th, 1992, then this was just bad data.

(The final score according to Database Basketball was DET 92 SEA 98. I've modified the chart to reflect the correction.)
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Old 11-22-2006, 12:06 AM   #11 (permalink)
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Ganchrow, where do you find the point spreads in Covers. I can't find the data on the web site and I'd like to do some analysis to test out my systems.

Jason
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Old 11-22-2006, 05:20 AM   #12 (permalink)
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Quote:
Originally Posted by zxcjason
Ganchrow, where do you find the point spreads in Covers
Go the Covers NBA Team Page. From there you click on a team link and then click "Past Results" at the top of the page beneath the team's name.
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Old 12-05-2006, 04:39 AM   #13 (permalink)