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Political parties want to know what groups of people support them. The General Social Survey (GSS) asked its 2014 sample, “Generally speaking, do you usually think of yourself as a Republican, Democrat, Independent, or what?” The GSS is essentially an SRS of American adults. Here is a large two-way tale breaking down the responses by the highest degree the subject held:
None High School Junior High Bachelor Graduate
Strong Democrat 53 198 23 81 64
Not strong Democrat 52 204 31 70 49
Independent, near Dem. 40 163 26 66 42
Independent 118 251 36 67 30
Independent, near Rep. 24 136 19 45 25
Not strong Republican 19 142 30 71 30
Strong Republican 18 131 15 53 28
Other Party 5 31 3 15 8
1. Make a 2×5 table by combining the counts in the three rows that mention Democrats, Republicans and ignoring strict independents and supporters of other parties. We might think of this table as comparing all adults who lean Democrat or Republican. How does support for the two major parties differ among adults with different levels of education?
2. Use the full table to analyze the differences in political party support among levels of education. The sample is so large that the differences are bound to be highly significant. but give the χ2χ2 test statistic and p-value nonetheless. The main challenge is in seeing what the data say. Does the full table yield any insights not found in the compressed table analyzed in part 1?