hi,

some questions are not formulated in the gest way imo:

e.g 4

True, though dummy variables would be prederred - so the expected answer is probabl False

5. which transformation wozld you use?

6. Why false?

9. Econometricians use such models, so technically the answer is True. The expected answer is probably False, for some X Y will surely get out of the +/- 1 range