sabina lectures 8 and beyond

Question 1

dummy coding with more than 2 ivs

Answer 1

make a composite, can not dummy code with numebrs other than 0 and 1. No more than two categories. With more than 2, you must use several dummy coded variables. If you have J categories you need j-1. So 5 things you need 4 dummy variables.

Question 2

et sqaure

Answer 2

SAME AS R2

Question 3

mean centering

Answer 3

original variable minus the mean, then label it New(Variable) eg NewSex