Unit 13d: Regression with Categorical Variables

Question 1

can you use a
regression to run a t-test

Answer 1

yes if you create dummy variables (refer to Week 5 lab)

Regression equations only
take numerical values. So we
needed to convert our
categorical ones into
dichotomous dummy variables
with values of 0 and 1

Steps:
1. Create dummy variables (refer to Week 5 lab)
2. Decide on your reference group
1. This is the group that you’re comparing things against
2. They are left OUT of the equation
ℎ𝑝 = 𝑏0 + 𝑏1𝑒𝑙𝑒𝑐𝑡𝑟𝑖𝑐 + 𝑒
ℎ𝑝 = 𝑏0 + 𝑏1𝑓𝑖𝑟𝑒 + 𝑒