Wilfley and colleagues (2001), in a study of binge eating disorder, compared 37 women getting treatment in a clinic to a control group of 108 otherwise similar women from the general community. However, before beginning their analysis, they needed to check that the two groups were in fact not different in important ways. For example, they reported the following: "Equivalent proportions of women in the clinic (N = 32, 87%) and the community (N = 89, 82%) samples were obese . . . X2(1, N = 145) = 0.33, p = .56"
(a) Figure the chi-square yourself (your results should be the same, within rounding error).
(b) Figure the effect size.