Hi On 18 Nov 2003, Sharon Lane-Getaz wrote:
> I have ordinal data that I collected by grading a statistics > project based on an established rubric. The data is being > used to measure students' increased conceptual understanding. > Using the inappropriate t-tests to measure a difference in > means from year to year, the data show statistically > stignificant increases. > However, a nonparametric approach would be more appropriate > (and more conservative.) Can someone point me in the > direction of a non parametric test that could be conducted on Occasionally (i.e., every decade or two) the debate over parametric statistics and level of measurement emerges from the depths, where it should stay buried. Use your parametric stats and hope that you don't have to run it by someone misled by Stevens' long-ago misguided paper on the issue. If you want some justification, search for references to John Gaito. Best wishes Jim ============================================================================ James M. Clark (204) 786-9757 Department of Psychology (204) 774-4134 Fax University of Winnipeg 4L05D Winnipeg, Manitoba R3B 2E9 [EMAIL PROTECTED] CANADA http://www.uwinnipeg.ca/~clark ============================================================================ . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
