Altamura, Dell\'Osso, Vismara, and Mundo (2008) measured the relationship betwee

Question

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        Total

Gender          Men               20                                5                              25

                 Women              55                               33                             88

                    Total               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.)

X^2obt = ________

Explanation / Answer

Oi ei (oi-ei)^2/ei 20 16.5929204 0.69958702 5 8.40707965 1.38076386 55 58.4070796 0.19874631 33 29.5929204 0.39226246 sum= 2.67135965 Chi square= 2.67135965 rows= 2 cols 2 df= 1 alpha= 0.05 Critical value 3.84145882 P value 0.10216871

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