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A poll reported 39% support for a statewide election with a margin of error of 1.8 percentage points. How many voters should be sampled for

A poll reported 39% support for a statewide election with a margin of error of 1.8 percentage points. How many voters should be sampled for a 99% confidence interval? Round up to the nearest whole number

Confidence level	Critical value
0.90	z=1.645
0.95	z=1.960
0.99	z=2.576

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