Question: In a presidential election year candidates want to know how

In a presidential election year, candidates want to know how voters in various parts of the country will vote.
Suppose that 1 month before the election a random sample of 540 registered voters from one geographic region is surveyed. From this sample 320 indicate that they plan to vote for this particular candidate. Based on this survey data, find the 95% confidence interval estimate of this candidate's current support in this geographic area.

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