when working your own set of values for lets say a data set of values in any half time score probability do you guys crop out outliers and to what degree.if you did ,would data set be more accurate or not
Question about outliers
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steve227SBR Hustler
- 08-20-09
- 61
#1Question about outliersTags: None -
roasthawgSBR MVP
- 11-09-07
- 2990
#2I leave them in but it's something I go back and forth on.Comment -
PokerjoeSBR Wise Guy
- 04-17-09
- 704
#3There are times a median is more useful than an average. Play around with that. If you're using excel, look into TRIMMEAN. But it is important not to let your numbers get warped by extreme results.Comment -
steve227SBR Hustler
- 08-20-09
- 61
#4thanks for the info guys bol this yearComment -
uva3021SBR Wise Guy
- 03-01-07
- 537
#5well it depends on sample size, which is obvious and banal, but i wouldn't ignore outliers, just find another way to optimize your central tendency (as mentioned maybe median, mode, etc...)
don't remove apparent anomalies because it works mathematically, for those anomalies are part of the system itself, and variation within the system as a whole just like every other number is variation within that same systemComment -
WrecktangleSBR MVP
- 03-01-09
- 1524
#6Outliers can be a very serious problem especially if you are using regression. You must examine each to see if it is an erroneous point as it will "punch way over its weight" in the regression. Typically I regress with all points in and then with suspected outliers removed to see how much change results in the regression equation. Almost always I remove them.Comment -
Maverick22SBR Wise Guy
- 04-10-10
- 807
#7Do like they do in scoring gymnastics.(or is it figure skating)?
Throw out the worst. Throw out the best. And use the rest.Comment -
PokerjoeSBR Wise Guy
- 04-17-09
- 704
#8I don't think it's that simple, Maverick, though TRIMMEAN does exactly that.
Consider a team that (however you do it) rates 90, 94, 76, and 89 in it's last 4 games.
I wouldn't throw out the high and low scores. They're all fair info on the team's ability. I'd average them, or median/average them (that being a half median, half average).
But there are other data sets where the extreme results should be discounted or ignored, sure.Comment
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