Help System (web edition)

Multiple comparisons of means vectors may be done by the Roy's
largest root method, e. g.
     ANOVA IEADATA,20
     DEPENDENT=Knowldge,Applicat,Mentalpr,Comprehn
     GROUPING=Attitude  METHOD=LROOT(s)
where the letter S indicates that the significance levels for the
test statistics are printed too. Simultaneous confidence intervals
may be obtained if the wanted significance level is given instead
of the letter S, e.g. LROOT(0.10). The program uses Pillai's
approximation for the distribution of largest root of a multivariate
beta matrix. Thus large siginificance levels (e.g. >0.20) should
not be used. Further, for some degrees of freedoms the confidence
intervals or significance levels printed seems to be too small (0-1 %).

Further information:
    M = Multivariate analysis of variance (usual MANOVA model) 
    G = Multivariate analysis of repeated measurements 
    A = More on ANOVA operations