Ch 1/2

Question 1

marginal distribution

Answer 1

distribution of one variable without another fixed variable

Question 2

conditional distribution

Answer 2

distribution of one variable WITH a fixed condition for the other variable

Question 3

what makes 2 variables associated?

Answer 3

if they have evidently different conditional distributions

Question 3

what is simpson’s paradox

Answer 3

a change in the direction of association between two categorical variables when accounting for a third variable