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Confidence level Critical value 0.90 z=1.645 0.95 z=1.960 0.99 z=2.576 A poll reported 58% support for a statewide election with a margin of error of

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

A poll reported 58% support for a statewide election with a margin of error of 2.2 percentage points. How many voters should be sampled for a 95% confidence interval? Round up to the nearest whole number.

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