Unbalanced ANOVA

The Unbalanced ANOVA menu allows you to fit completely general models to unbalanced data. The analysis of variance is carried out using the regression facilities in GenStat. The method takes account of any blocking structure, however, it cannot produce stratified analyses, and is able to estimate treatments and covariates only in the "bottom stratum". So, for example, the full analysis can be produced for a randomized block design, where the treatments are all estimated on the plots within blocks, but it cannot produce the whole-plot analysis in a split plot design.

Unbalanced analysis of variance can also be found on the General Analysis of Variance menu by selecting the Unbalanced Treatment Structure design.

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.

Blocking (Nuisance Terms)

Blocking, or nuisance, terms to be removed before fitting treatments.

Factorial

Controls the level of interactions to be fitted.

Available Data

This lists data structures appropriate to the current input field. It lists either factors for use in specifying the treatment 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 model formula. 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.

Action Buttons

Run	Run the analysis.
Cancel	Close the menu without further changes.
Options	Opens a dialog where additional options and settings can be specified for the analysis.
Defaults	Set the menu settings back to the default settings. Clicking the right mouse on this button produces a pop-up menu where you can choose to set the menu using the currently stored defaults or the GenStat default settings.
Save	Opens a dialog to specify names of structures to save the results from the analysis. The results can only be saved after running an analysis.
Further Output	Opens a dialog where additional output subsequent to an analysis can be produced along with Residual Plots and Means Plots.