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ERIC Number: EJ1018822
Record Type: Journal
Publication Date: 2013
Pages: 18
Abstractor: As Provided
ISSN: ISSN-0211-2159
The Adequacy of Different Robust Statistical Tests in Comparing Two Independent Groups
Pero-Cebollero, Maribel; Guardia-Olmos, Joan
Psicologica: International Journal of Methodology and Experimental Psychology, v34 n2 p407-424 2013
In the current study, we evaluated various robust statistical methods for comparing two independent groups. Two scenarios for simulation were generated: one of equality and another of population mean differences. In each of the scenarios, 33 experimental conditions were used as a function of sample size, standard deviation and asymmetry. For each condition, 5000 replications per group were generated. The results obtained by this study show an adequate type error I rate but not a high power for the confidence intervals. In general, for the two scenarios studied (mean population differences and not mean population differences) in the different conditions analysed, the Mann-Whitney U-test demonstrated strong performance, and a little worse the t-test of Yuen-Welch.
University of Valencia. Dept. Metodologia, Facultad de Psicologia, Avda. Blasco Ibanez 21, 46010 Valencia, Spain. Tel: +34-96-386-4100; Web site:
Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A