COMMERCE 2QA3 Lecture 14: 14___
17 Dec 2015
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* independent group assumption: women and men are two independent groups. * 10% condition: the sample represents less than 10% of all employees in a medium sized company. : 1: write the null and alternative hypotheses (assuming women are group 1 and men are group 2). Answer: h0: 1 - 2 = 0 ha: 1 - 2 > 0. Answer: since the p-value is low, we reject the null hypothesis. There is evidence of a difference in the average number of hours of personal time taken by women and men. Answer: using 10 degrees of freedom, the critical t-value is 1. 812. We are 90% confident that, on average, women take between 0. 30 and 5. 48 more hours of personal time than men. * independent group assumption: company a and company b are two independent groups. * randomization condition: samples were taken by random selection.
