The following table cross-classifies votes in the 2008 and 2012 US Presidential elections. V   Vote in 2012 Vote in 2008 Obama Romney Obama 802 53 McCain 34 494   a) Find and interpret risk difference, relative risk, and odds ratio b) Use a chi-square test to test the hypothesis that vote in 2008 and vote in 2012 are independent c) Construct a 95% confidence interval for risk difference d) Construct a 95% confidence interval for relative risk e) Construct a 95% confidence interval for odds ratio.

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