Sunday, June 9, 2019
SPSS for analyzing data with one IV and more than one DV & one-way Essay
SPSS for analyzing data with wiz IV and more than maven DV & one-way between subjects MANOVA - Essay Exampleat the multivariate test results, all the four multivariate tests reveal significant results and hence it is okay to conclude that group social rank effects on the psychological aspects evaluated, even after the test effects of item difficulties are controlled on performance of people in the three areas.Statistics for univariate comparisons of way are designs with only one dependent variable (DV). By comparison, statistics for multivariate comparisons of means have more than one dependent variable. The MANOVA may be both one-way (one IV) or factorial (more than one IV).For these analyses, there is more than one DV. The different DVs, which are at least moderately correlated, are combined into a composite variable called a variate. The combined DVs serve to predict the between-group differences of the scores for the conditions of the IV.A challenge arises in a research desi gn that features only one IV with only 2 conditions. If a researcher desires to analyze two or more moderately correlated DVs rather than using a t-test with one DV, the multivariate Hotellings T2 can be used instead of separate t-tests for this situation. Instead of the null hypothesis for a t-test (M1 = M2), the null hypothesis for the Hotellings T2 is that the vectors of means for group A are the same as the vectors of means for group B. The value of Hotellings T2 can be transformed into four F-values Wilks lambda, Pillais trace, Hotellings trace, and Roys largest root. When these F-values are significant at the alpha take determioned for the study (e.g., = .05), the researcher can reject the null hypothesis.Usually the finding of significant multivariate effects is followed by analyses where the relationship between the IV(s) and each of the DVs is analyse separately, using a univariate method to compare means (e.g., a t-test, a one-way ANOVA, a factorial ANOVA). Because ther e are multiple tests for multiple DVs, both test distorts the actual alpha level. That is, the
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