Manipulating the Data File

- Sort cases by dicho, then back to sort by id

- Omit cases 1-10 and then re-establish them

- Change dicho to a string variable (and then back to numeric)

- Create a new 6-level IV based on the 6 groups created by the cross of dicho and tricho

Analysis

- Perform a 1-way ANOVA on dv1 with tricho as the IV

- Split the file by dicho and perform the 1way again

- Unsplit the file (i.e., use all cases)

- Test the linear trend of tricho on dv3. What can you say about the residual?

- Graph the tricho-dicho interaction