In: Statistics and Probability
Altamura, Dell'Osso, Vismara, and Mundo (2008) measured the relationship between gender and duration of untreated illness (DUI) among a sample of those suffering from major depressive disorder (MDD). The following table lists the observed frequencies from this study.
Duration of Untreated Illness DUI ≤ 12 Months DUI > 12 Months Gender Men 20 5 25 Women 55 33 88 75 38 N = 113
Compute a chi-square test for independence at a 0.05 level of significance. (Round your answer to two decimal places.) $ \chi_{obt}^2 $ = Decide whether to retain or reject the null hypothesis.