Use the three-level depression diagnosis and dichotomized education (more than 12 years education or not) in the DOS data to test the association between education and depression.

(a) Use the Pearson chi-square statistic for the test;

(b) Use the row mean score test;

(c) Use the Pearson correlation test;

(d) Compare results from (a), (b), and

(c) and describe your findings.