Question

Political parties want to know what groups of people support them. The General Social Survey (GSS)...

Political parties want to know what groups of people support them. The General Social Survey (GSS) asked its 2012 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 table breaking down the responses by the highest degree the subject held:

NONE HIGH
SCHOOL
JR.
COLLEGE
BACHELOR GRADUATE
Strong Democrat 45 163 32 61 55
Not strong
Democrat
45 176 24 63 35
Independent,
near Democrat
34 121 9 44 33
Independent 104 189 25 38 26
Independent,
near Republican
20 80 17 32 16
Not strong
Republican
21 127 18 66 18
Strong
Republican
11 102 17 47 19
Other party 8 26 5 9 10

Give a 95% confidence interval (±±0.0001) for the proportion of adults who are "Independent."

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