General Analysis of Variance is the most general of the ANOVA menus,
covering the full range of designs analysed by the ANOVA directive.
Design
Can be used to switch to other, more specific types of
designs.
Y-Variate
This should be set to the variate containing the data values.
Treatment structure
The treatment terms to be fitted are specified by entering a model formula.
Contrasts
Generates a menu that allows you to specify one or more treatment contrasts that you wish to analyse.
Block structure
The underlying structure of the design is defined by entering a model formula. This can be left blank
with unstructured (completely randomized) designs.
Interactions
Controls the level of interactions to be fitted - you can indicate either All Interactions, or just
main effects (No Interactions), or indicate the level of interaction (that is, set a limit on the
maximum number of factors in the treatment terms that are fitted).
Available Data
This lists data structures appropriate to the current input field. It lists either factors for use in specifying
the treatment and block structure, or variates for specifying the data and additional covariates. The contents
will change as you move from one field to the next. Double-click on a name to copy it to the current input field;
alternatively, you can type the name directly into the input field.
Operators
This provides a quick way of entering operators in the treatment and block model formulas. Double-click on the required
symbol to copy it to the current input field. You can also type in operators directly.
See model formula for a description of each.
Covariates
Select the check box if you want to perform analysis of covariance. This produces an additional field in which you can
list the covariates for the analysis. If there is more than one, their names must be separated by spaces or commas.