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2013-11-04
请教各位高手:SAS Logistic 输出结果中Percent Tied什么意思呢  
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2013-11-5 09:06:44
顶起.JingJu
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2013-11-6 00:12:24
Shamelessly copied from SAS documentation,
"A pair of observations with different observed responses is said to be concordant if the observation with the lower ordered response value has a lower predicted mean score than the observation with the higher ordered response value. If the observation with the lower ordered response value has a higher predicted mean score than the observation with the higher ordered response value, then the pair is discordant. If the pair is neither concordant nor discordant, it is a tie. Enumeration of the total numbers of concordant and discordant pairs is carried out by categorizing the predicted mean score into intervals of length  and accumulating the corresponding frequencies of observations. Note that the length of these intervals can be modified by specification of the BINWIDTH= option in the MODEL statement. "
So, it's easy to calcuate the percentages by yourself. Just keep in mind a pair ties if the predicted probability lies in the same BIN.
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Example copythefted from
http://support.sas.com/documenta ... ogistic_sect064.htm
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2013-11-12 16:07:23
thank you very much!!!
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