Estimates

The Estimates tab produces estimates output instead of contrasts. As such, the coefficients need not sum to zero. Additionally, multiple model terms may be included in a single estimate.

Unlike contrasts, estimates do not support joint estimates. The intervals are marginal. The level must be between zero and 100. Note that it is entered as a percent: Entering 0.95 will yield a very narrow interval with coverage just less than 1%.

All other options act similarly to the corresponding options in the Contrasts tab.

Drag a model term from the Fixed Effect Model Terms box to the Effect field.

Multiple model terms can be dragged from the Fixed Effect Model Terms box to the Effect field.

To remove a model term, use the pointer to drag a model term from the Effect field back to the Fixed Effects Model Terms box.

In the Title field, type a title for the estimate.

The title is displayed in the Estimates and Estimates Coefficients worksheets.

In the Coefficients column, type the coefficient value for each level of the model term in the estimate.

Check the Intercept Coefficient box to include the intercept in the estimate.

In the Intercept Coefficient field, type the coefficient value for the intercept.

In the Confidence Level field, type the level percentage. The default level is 95%.

Typically, this value does not need to be changed.

To set the degrees of freedom, check the User specified degrees of freedom box and type a value greater than one (1) in the field.

Note: Only select the User specified degrees of freedom option if the Phoenix engine does not seem to use the appropriate choices for the degrees of freedom.

Check the Show coefficients of estimates box to display the actual coefficients used in the Estimates Coefficients results worksheet.

In the Estimability Tolerance field, type a value for the zero vector.

The estimability tolerance value indicates the closeness of the zero vector before the Phoenix engine is used to make it estimable. The default value is 1E–05. Typically, this value does not need to be changed.

Press Add Estimate to add another contrast.

Each estimate is tested independently of other estimates. Enter up to 100 estimates.

Press Delete Estimate to delete a contrast.