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z value based probability problem

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Suppose that 40 percent of the voters in a particular region support a candidate. Find the probability that a sample of 900 voters would yield a sample proportion in favor of the candidate within 3 percentage points of the actual proportion.

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This solution provides detailed explanation how to find out the z value based probability problem.

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Hi there,

It's known that p = 0.40, n = 900
then Standard error of proportion, SE = ...

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