[EMAIL PROTECTED] (Donald Burrill) wrote: >... nor why you >have asked the question.
I have asked the question because I haven't grasped the concept of paired vs unpaired data completely yet. The statistics books I read so far only gave specific examples for pre-/post-test data and only mentioned that there can also be other paired data such as from daughter/mother pairs, couples, twins, siblings, etc. First, I thought the subjects yielding paired data have to homogeneous or as similar as possible, a condition which is perfectly fullfilled for repeated measurements on the same subjects, but since siblings and couples aren't necessarily very alike this can't really be a criterion. The only required criterion seems to be that each measured variable can be assigned unambiguously to another one, which is true for all the above cases. Rich Ulrich gave male/female as an example but I can't see how I can unambiguously assign one male to one female for comparing the measured variables. Peter . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
