Regression Prediction Comparisons

Use this to make comparisons between predicted means from a linear or generalized linear regression.

Available data

This lists data structures appropriate to the current input field. The contents will change as you move from one field to the next. You can double-click a name to copy it to the current input field or type it in.

Comparison factor

Specifies the factor amongst whose levels the comparisons are to be calculated.

Comparison matrix

Provides a space to provide a matrix to specify the comparisons to be calculated. Each row in the matrix represents a separate contrast, and the columns in the matrix correspond to the factor levels.

Groups

Specifies a factor to indicate that the comparisons are to be made for each level of that factor, or you can set it to a list of factors to make the comparisons for every combination of the levels of those factors.

Display

Specifies the output to be displayed.

Analysis of variance	Displays an analysis of variance giving the sums of squares and so on for the comparisons.
Contrasts	Displays the contrasts.

Standard errors

Specifies the form in which standard errors will be displayed: as standard errors of the contrasts, standard errors of differences, or least-significant differences (LSDs). If required, more than one type of standard error can be printed. The significance level for LSDs can be specified as a percentage (default 5) in the accompanying field.