Negative R-square problem

Quick note:

When we add covariates to the model, we expect variance to reduce, but we can get negative R-squares from between-school variance.  This is because when we adjust for predictors the school averages/intercepts may change for both directions.  The between school variance may reduce or may enlarge as the meaning of school averages/intercept changes.  Can I simulate the case where between-school variance in fact enlarges??  Maybe this happens when pretest is very different by the two groups.

Microsoft Access, Creating forms

When I put subforms into the main form, I need to make sure that the main ID and the sub IDs are all correct.  I need to make this correct in three places.

  • Highlight the form by clicking on it to activate the property sheet.  Find DATA, LINK CHILD FIELDS and specify the correct subID.
  • Also remove the solidline.

f you select multiple buttons by pressing and hold Ctrl key, then right click, you should be able to change any common property of the buttons.