The data set listed in the following table contains information on AGE, SEX (1 = male, 2 = female), work problems index (WP), marital conflict index (MC), and depression index (DEP) for a sample of 39 new admissions to a psychiatric clinic at a large university hospital. For each sex separately, determine (using α = .10) the best regression model relating DEP to MC and WP, controlling for AGE, using the following sequential procedure: (1) force AGE into the model first; (2) use the all possible regressions approach on the remaining two independent variables WP and MC; (3) determine whether the interaction term (MC × WP) should be added to the model. Compare and discuss the results obtained for each sex.

955361213892012 6 8 0 8 2 7 4 4 4 6 2 2 4 8 2-8 673786091609885978839 3388565 9 9 2 9 3 8311083762723 MC-70 75 32 30 55 6 20 63 4 2 = 7 8 15 6 57 29 80 125 30 9 4 24 21 = 011 22 21 77 67 25 14 17 18 42 36 2 2 77 67 2 14 17 s 122111122 5505 5002200005000000 0 8 0 0 4 8000005 77 7 7 8 9 8 7 8 6 7 8 777, 7 7 778887 45 35 32 32 39 25 22 26261 2 2 3 4 4 4 4 4 4 4 5 4 3 3 4 2 3 2 2 3 2 2 2 4 233242 49 47 48 49 45 41 45 59 42 35 31 45 28 37 29 29 31 29 29 29 44 28 32 36 46 21 34 27 31 19 4333 123456789012345678901 22 23 24 25 26 27 28 29 30 3 3 3 3 3 36 3 83 3