> You see, you are using a qualitative estimate of non-normality (box
plot)! I want a rule based on a quantitative estimate.
I may disagree to the above notion. Yes, data visualization such as using
boxplots, histograms, and Q-Q plots involves subjective judgment and does
not have a strict cut-off rule. Still, there are rules (e.g. how to divide
quantite, what bandwidth and smoothing algorithms to use) to make graphs.
On the other hand, so-called rule based methods also involve subjective
decisions (why .05 as the alpha? why .80 as the power level?)
The line between "qualitative" and "quantitative" are a bit blurred.
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Chong-ho (Alex) Yu, Ph.D., MCSE, CNE
Academic Research Professional/Manager
Educational Data Communication, Assessment, Research and Evaluation
Farmer 418
Arizona State University
Tempe AZ 85287-0611
Email: [EMAIL PROTECTED]
URL:http://seamonkey.ed.asu.edu/~alex/
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