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Peer reviewed Peer reviewed
ERIC Number: EJ523935
Record Type: CIJE
Publication Date: 1995
Pages: N/A
Abstractor: N/A
Reference Count: 0
ISBN: N/A
ISSN: ISSN-0022-0973
Increasing the Power of Nonparametric Tests by Detecting and Downweighting Outliers.
Zimmerman, Donald W.
Journal of Experimental Education, v64 n1 p71-78 Fall 1995
It is argued that outlier-prone distributions reduce the power of nonparametric tests, but power can be restored through procedures usually associated with parametric tests. Computer simulation is used to show how an outlier detection and downweighting procedure augments the power of the t-test and the Wilcoxon-Mann-Whitney test. (SLD)
Descriptors: Computer Simulation, Identification, Nonparametric Statistics, Power (Statistics), Statistical Distributions
Publication Type: Reports - Evaluative; Journal Articles
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Identifiers: Outliers; T Test; Weighting (Statistical); Wilcoxon Mann Whitney Test
Note: Research supported by a grant from Carleton University.