Correlation coefficient using Goodman and Kristal's gamma.
A investigator hypothesizes that parents with schoolaged children are more likely to vote in favor of a referendum increasing public school spending than adults without schoolaged children, but wonders of this relationship holds for both Democrats and Republicans. Determine whether this hypothesis holds for the following data.
Democrats Republicans

No Children

Children




No Children

Children


Yes

40

45

85


Yes

15

20

35

No

10

5

15


No

35

30

65


50

50

100



50

50

100

Reconstruct the zeroorder referendum attitude by parenting status table, and find outs the table's correlation coefficient. Then find out the partial table correlations and determine whether the hypothesis is correct.