
cells combined: analysis of variance includes a way to perform that test
and many others.
One more warning: ANOVA can be conducted with any number of
factors, but experience has shown that the human mind can rarely com-
prehend interactions of more than three independent variables.
Multivariate ANOVA
The analysis of variance can be extended to the analysis of the effects of
one or more independent variables on more than one dependent vari-
able. This is not a topic for the squeamish, and we will not dwell on it
here. Most statistical software, such as SAS, SPSS, and others, will perform
multivariate analysis of variance, or MANOVA, as it is called. Usually ...