Donald W. Zimmerman

Relative Power of the Wilcoxon Test, the Friedman Test, and Repeated-Measures ANOVA on Ranks

Donald W. Zimmerman, Bruno D. Zumbo · The Journal of Experimental Education · 1993 · 458 citations

Engineering, Friedman Test, Comparative Test +16

A note on preliminary tests of equality of variances

Donald W. Zimmerman · British Journal of Mathematical and Statistical Psychology · 2004 · 305 citations

Is the selection of statistical methods governed by level of measurement?

Bruno D. Zumbo, Donald W. Zimmerman · Canadian Psychology/Psychologie canadienne · 1993 · 293 citations

Measurement Theory, Measurement, Parametric Statistics +17

Are Simple Gain Scores Obsolete?

Richard H. Williams, Donald W. Zimmerman · Applied Psychological Measurement · 1996 · 195 citations · Full text

Reliability, Posttest Scores, Engineering +15

Comparative Power of Student<i>T</i>Test and Mann-Whitney<i>U</i>Test for Unequal Sample Sizes and Variances

Donald W. Zimmerman · The Journal of Experimental Education · 1987 · 195 citations

T Test, Parametric Assumption, U Test +13