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A poll is taken in which 399 out of 550 randomly selected voters indicated their preference...

A poll is taken in which 399 out of 550 randomly selected voters indicated their preference for a certain candidate.

(a) Find a 95% confidence interval for p.

≤p≤

(b) Find the margin of error for this 95% confidence interval for p.

Math   Statistics-And-Probability   
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