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The starting point of the ANOVA operation is always data. Input
in other froms may be used in ANOVAS operation. E.g.
    ANOVAS IEAMEANS,END+2
    CELLN=Nofobs CELLM=Knowmean CELLD=Knowdev
    GROUPING=Attitude,SEX
where the SURVO data file IEAMEANS contains group means, deviations
and numbers of observations in the groups defined by the two
grouping variables. The input may contain cell sums (CELLS) instead
of cell means. Correspondingly, the input may contain variances
(CELLV) or sum of squares (CELLSS) instead of deviations. If the
sample sizes are equal then the common sample size may be given
by the SMPLSIZE statement. Further, if methods for homogeneous
group variances are used only, then it is sufficient to give
the estimate of error variance (EVAR) and its degrees of freedoms
(DF) instead of deviations.
c
Further information:
         A = More information on ANOVA operations