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A poll is taken in which 399 out of 500 randomly selected voters indicated their preference...

A poll is taken in which 399 out of 500 randomly selected voters indicated their preference for a certain candidate. (a) Find a 98% confidence interval for p. (b) Find the margin of error for this 98% confidence interval for p.

Math   Statistics-And-Probability   
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Answer #1

(a)

The 98% confidence interval for p is (0.756, 0.840).

(b)

The margin of error is

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