One question (coded EQUALIZE) on a recent GSS asked, "Do you think that it should be govern- ment's responsibility to reduce income differences between the rich and the poor?" Those answer- ing yes included 90 of the 142 subjects who called themselves "strong Democrat" in political party identification and 26 of the 102 who called them- selves "strong Republican."

(a) Find the point estimate of the population pro- portion who would answer yes for each group.

(b) The 95% confidence interval for the popu- lation proportion of yes responses is (0.55, 0.71) for strong Democrats and (0.17,0.34) for strong Republicans. Explain how to interpret the intervals.