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ERIC Number: EJ598313
Record Type: Journal
Publication Date: 1994
Pages: N/A
Abstractor: N/A
Reference Count: N/A
ISSN: ISSN-1076-9986
Type I Error Rates for Welch's Test and James' Second-Order Test under Nonnormality and Inequality of Variance When There Are Two Groups.
Algina, James; Oshima, T. C.; Lin, Wen-Ying
Journal of Educational and Behavioral Statistics, v19 n3 p275-91 Fall 1994
Estimated Type I error rates for three tests that compare means by testing data from two independent samples: (1) the independent samples "t" test; (2) B. Welch's approximate degrees of freedom test (1938); and (3) G. James's second-order test (1951, 1954). Results provide guidance about the total sample sizes required for controlling Type I error rates. (SLD)
Publication Type: Journal Articles; Reports - Evaluative
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A