INFORMATION POINT: Wilks’ lambda - Wiley …

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INFORMATION POINT: wilks ' lambdaWilks' lambda is a test statistic used in multivariate analysis of variance(MANOVA) to test whether there are differences between the means ofidenti ed groups of subjects on a combination of dependent variables. Forexample, in the paper above, the authors test whether the mean score of twogroups, graduates and diplomates, is the same across eight constructssimultaneously. Thus, they are considering eight dependent variables andcomparing the mean of this combination for two ' lambda performs, in the multivariate setting, with a combination ofdependent variables, the same role as theF-test performs in one-way analysisof variance. wilks ' lambda is a direct measure of the proportion of variance inthe combination of dependent variables that is unaccounted for by theindependent variable (the grouping variable or factor). If a large proportionof the variance is accounted for by the independent variable then it suggeststhat there is an effect from the grouping variable and that the groups (in thiscase the graduates and diplomates) have different mean ' lambda statistic can be transformed (mathematically adjusted) to astatistic which has approximately anFdistribution.

INFORMATION POINT: Wilks’ lambda Wilks’ lambda is a test statistic used in multivariate analysis of variance (MANOVA) to test …

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