Critical values for quick reference during this activity. Confidence level Critical value 2 = 1.645 2= 1.960 2* = 2.576 0.90 0.95 0.99 476172 1877292.q3zny? Jump to level 1 A poll for a statewide election has a margin of error of 3.54 percentage points. How many voters should be sampled for a 99% confidence interval? Round up to the nearest whole number. Ex: 1234 voters

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