1. Has Support for Capital Punishment Changed Over Time? Surveys taken in 1974 and in 2006 provide this data about whether or not US citizens favor the death penalty: Year Favor Oppose Total 1974 937 473 1410 2006 1945 870 2815 Find a 95% confidence interval for the change in the proportion of people supporting the death penalty between 1974 and 2006. Is it plausible that the proportion has not changed?
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For 1974: p1 = 937/2217 = 0.422 For 2006: p2 = 1945/4755 = 0.409 Show more…
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