1. A two-factor research study has two levels of factor A and two levels of factor B with n = 10 participants in each treatment condition. For this study, what is the value for dfbetween treatments?

2. For an experiment involving 2 levels of factor A and 3 levels of factor B, with a sample of n = 10 in each treatment condition, what are the df values for the F-ratio for the A x B interaction?

3. For the following data, compute the Pearson correlation:

X Y

2 0

3 1

7 4

5 6

4 6

3 1