The article “Gender Differences in Individuals with Comorbid Alcohol Dependence and Post-Traumatic Stress Disorder (Am. J. Addict. 2003: 412–423) reported the accompanying data on total score on the Obsessive-Compulsive Drinking Scale (OCSD).

Formulate hypotheses and carry out an appropriate analysis. Does your conclusion depend on whether a significance level of .05 or .01 was employed? (The cited paper reported P-value < .05; presumably .05 would have been replaced by .01 if the P-value were really that small).

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Gender Male Female Sample size 44 40 Sample mean 19.93 16.26 Sample SD 7.74 7.58