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|a ED430047 Microfiche
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|a ED430047 Microfiche
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1 |
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|a Barnette, J. Jackson.
|0 http://id.loc.gov/authorities/names/no91011717
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| 245 |
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|a Choosing a Multiple Comparison Procedure Based on Alpha /
|c J. Jackson Barnette and James E. McLean.
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|a [Place of publication not identified] :
|b Distributed by ERIC Clearinghouse,
|c 1999.
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| 300 |
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|a 18 pages
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| 336 |
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|a text
|b txt
|2 rdacontent
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|a microform
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|a ERIC Note: Paper presented at the Annual Meeting of the American Educational Research Association (Montreal, Quebec, Canada, April 19-23, 1999).
|5 ericd
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|a Four of the most commonly used multiple comparison procedures were compared for pairwise comparisons and relative to control of per-experiment and experimentwise Type I errors when conducted as protected or unprotected tests. The methods are: (1) Dunn-Bonferroni; (2) Dunn-Sidak; (3) Holm's sequentially rejective; and (4) Tukey's honestly significant difference procedure (HSD). Monte Carlo methods were used to generate replications, and means and standard deviations of observed Type I error-rates and percentages of observed Type I errors within the 0.95 confidence intervals were determined for per-experiment and experimentwise conditions. Effects of numbers of groups and group sizes on these Type I error rates were examined. Of primary concern was the accuracy of these procedures compared with the nominal alpha. Results indicate that none of these tests should be conducted as protected tests, but only as unprotected tests, particularly when alpha is 0.05 or less. If the Type I error control philosophy is experimentwise, Tukey's HSD, as an unprotected test, is clearly the most accurate procedure across all three alpha levels. If the Type-I error control philosophy is per-experiment, the Dunn-Bonferroni, as an unprotected test, is clearly the most accurate procedure across all three alpha levels. (Contains 5 tables and 18 references.) (SLD)
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|a Microfiche.
|b [Washington D.C.]:
|c ERIC Clearinghouse
|e microfiches : positive.
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|a Microform.
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| 650 |
1 |
7 |
|a Comparative Analysis.
|2 ericd
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7 |
|a Monte Carlo Methods.
|2 ericd
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7 |
|a Research Methodology.
|2 ericd
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7 |
|a Selection.
|2 ericd
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7 |
|a Simulation.
|2 ericd
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|a Alpha Coefficient
|a Multiple Comparisons
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|a Type I Errors
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7 |
|a Reports, Evaluative.
|2 ericd
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|a Speeches/Meeting Papers.
|2 ericd
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|a McLean, James E.,
|e author.
|0 http://id.loc.gov/authorities/names/n84205126
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|b 211123
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|a Michigan State University-Library of Michigan
|b Michigan State University
|c MSU Microforms
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