9th April 2012, 12:21 PM
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Member
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Join Date: Jan 1970
Posts: 696
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Quote:
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Originally Posted by moeee
The first problem that needs to be overcome is that ALL 18 lines are included in the average.
I have no idea how to mechanically get rid of unsuitable lines , so I must go through each animal and get rid of , or modify lines that are biasing the rating incorrectly
For example Mister Mooms is clearly racing better now , so I eliminate a couple earlier poor performances
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Moeee, in one of those sheets Kennedy had, he asked for such a filter, I put in a z score filter, that would eliminate runs based on a zscore.
If you enter into your spreadsheet (ART- avg of all runs)/ stand deviation will produce a z score you may decide you don't want to include in your calculations any run that scores more then 1.00.
example
1 form line time = 19.807
average all runs = 19.722
stdevp .313
(19.807-19.722)/.313 = .271
this run is kept in your calculations.
Your better to look at a formline based on a z score I feel |