Altamura, Dell'Osso, Vismara, and Mundo (2008) measured the relationship between sex 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. Compute a chisquare test for independence at a .05 level of significance. Decide whether to retain or reject the null hypothesis.

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Duration of Untreated Illness DUI s 12 Months DUI>12 Months Men 20 25 Sex Women 75 38 N 113