Table 2.11 cross-classifies votes in the 2008 and 2012 US Presidential elections. Estimate and find a 95% confidence interval for the population odds ratio. Interpret. Table 2.11 Data on presidential votes, for exercise 2.11. Vote in 2008 | Vote in 2012: Obama | Vote in 2012: Romney --- | --- | --- Obama | 802 | 53 McCain | 34 | 494 Source: 2014 General Social Survey.
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The odds of voting for Obama in 2012 among those who voted for Obama in 2008 is 802/(802+53) = 15.08. The odds of voting for Obama in 2012 among those who voted for McCain in 2008 is 34/(34+494) = 0.068. The odds ratio (OR) is then calculated as (15.08)/(0.068) Show more…
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