Re: A regression question

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1 total messages Started by Dennis Roberts Mon, 26 Jul 1993 14:16

#1200

Author: Dennis Roberts
Date: Mon, 26 Jul 1993 14:16

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if the difference between the two subgroups is a matter of intercept but slopes
 are similar ... then using the coding variable as a second independent variabl
e and then a multiple regression ... would tend to produce an overall scatter p
lot that would not show as good of a trend as for each subgroup separately ...
but the coding variable should be a significant weight in the model. Seems like
 if you have evidence that shows that the general areas of the scatterplots are
 different for the two subgroups ... you would be better off treating each
separately

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