Thank you -- because this is an X (as opposed to Y), I assume that it's appropriate to transform by x-squared. However, when I do that, the results simply appear to have become positively skewed. Am I missing something? DW
--- Thom Baguley <[EMAIL PROTECTED]> wrote: > Dianne Worth wrote: > > > > Oops - what I meant to say was "What if my > NEGATIVELY > > skewed data all have negative values, say from -1 > to > > -7? Does the same logic/procedure still hold?" > > > > Because I cannot take the log of a negative number > and > > instead take the absolute value of those numbers, > I'll > > have positively skewed data. > > The log transform reduces positive skew. It would > make negative skew more > negative (if the values were computable). > > For negative skew you need to use different > transformations (e.g., y-squared). > If you have positive skew with zero or negative > values the traditional > solution is to add a constant. > > Thom > . > . > ================================================================= > Instructions for joining and leaving this list, > remarks about the > problem of INAPPROPRIATE MESSAGES, and archives are > available at: > . http://jse.stat.ncsu.edu/ > . > ================================================================= __________________________________ Do you Yahoo!? SBC Yahoo! DSL - Now only $29.95 per month! http://sbc.yahoo.com . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
