Replacing an outlier is acceptable, if an only if you have a sound reason, and the reason is NOT because it doesn't "fit."
When you do have to replace a mis- measured value, replacing with the average of a sample is sometimes done, PROVIDED the sample is truly from the identical population. If you think about it for a time, I suspect you will begin to understand why replacing measured values is done with such care - you don't want to fudge in a number that changes the results. Jay Dennis wrote: > Hi all > > I would like to remove outliers from my repetitive measures design, however > making it missing removes the whole case of the subject. > I've heard that it's possible to replace outliers with the mean of the > group. I am wondering if it's a standard practice (to use for my thesis), > and are there any good references? > If it is acceptable, how should I compute the mean if there are several > outliers in one group/DV, (or variable in SPSS)? > > Dennis > > . > . > ================================================================= > Instructions for joining and leaving this list, remarks about the > problem of INAPPROPRIATE MESSAGES, and archives are available at: > . http://jse.stat.ncsu.edu/ . > ================================================================= -- Jay Warner Principal Scientist Warner Consulting, Inc. 4444 North Green Bay Road Racine, WI 53404-1216 USA Ph: (262) 634-9100 FAX: (262) 681-1133 email: [EMAIL PROTECTED] web: http://www.a2q.com The A2Q Method (tm) -- What do you want to improve today? . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
