1. Consider the following crossclassification table between sex and political affiliation. What is the appropriate measure of association for this zero order table. Calculate that measure. Now consider a third variable, age, and review its relation in the first order partial tables. Calculate the measure of association for these first order partials and tell us, within the context of the statistical elaboration model, what is going on with this control variable.
The Marginal (Zero-Order) Table
All Male
Female
Total
Rep 30
10
40
Dem 10
30
40
Total 40
40
80
The Partial Tables
Young Male
Female
Total
Rep 10
10
20
Dem 10
10
20
Total 20
20
40
Old Male
Female
Total
Rep 20
0
20
Dem 0
20
20
Total 20
20
40
2. From Government statistcis, you compute a correlation of .55 between unemployments rates (X) and suicide rates (Y). A fellow student suggests the reason may be related to a reduction in income (Z) among unemployed. If the correlation between unemplyment rates (X) and income (Z) is 0.60 and the correlation between suicide rates (Y) and income (Z) is 0.40, what could you say about this student's suggestion (Remember what to do after you calculate the partial correlation coefficient).