JSM 2004 - Toronto

Abstract #301680

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Activity Number: 345
Type: Contributed
Date/Time: Wednesday, August 11, 2004 : 12:00 PM to 1:50 PM
Sponsor: Section on Statistical Education
Abstract - #301680
Title: An Efficient Way to Display Pairwise Comparison Results in ANOVA
Author(s): J. Burdeane Orris*+ and Bruce Bowerman
Companies: Butler University and Miami University of Ohio
Address: 4600 Sunset Blvd., Indianapolis, IN, 46208,
Keywords: ANOVA ; pairwise ; Tukey ; teaching
Abstract:

While several statistical analysis packages display confidence intervals for post-hoc analysis, they do not make it easy for students to see patterns in the data. This paper discusses an efficient way to display pairwise comparison results in analysis of variance. Both individual pairwise comparisons and Tukey simultaneous comparisons are discussed for one-factor ANOVA, randomized blocks ANOVA, and two-factor ANOVA. This method is implemented using the Excel add-in, MegaStat, which takes advantage of Excel's ability to sort data and format cells to help students see how the group means cluster to form patterns in the data. The data are also displayed graphically to help students see the concept of within-group and between-group variation.

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Revised March 2004