You created a controlled comparison table displaying individuals' opinions on Prop 1 across different levels of individuals' incomes and partisanship. See the table below.

Calculate the controlled effect of annual income on support for Prop 1 among republicans.

Calculate the controlled effect of annual income on support for Prop 1 among democrats.

Calculate the partial effect of annual income on supporting Prop 1 when controlling for partisanship.

Opinion on Partisanship Republican Democrat Annual income Annual income Low High Total Low High Total Prop 1 Support 20% 60% 40% 40% 90% 65% Oppose 80% 40% 60% 60% 10% 35% Total 100% 100% 100% 100% 100% 100%