The General Social Survey (GSS) has been collecting demographic, behavioral,

The General Social Survey (GSS) has been collecting demographic, behavioral, and attitudinal information since 1972 to monitor changes within the US and to compare the US to other nations. Support for capital punishment (the death penalty) in the US is shown in 1974 and in 2006 in the two-way table in Table 6.6. Find a 95% confidence interval for the change in the proportion supporting capital punishment between 1974 and 2006. Is it plausible that the proportion supporting capital punishment has not changed?

Table 6.6

Year Favor Total Oppose 473 870 1974 2006 937 1410 1945 2815

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