Critical values for quick reference during this activity. Confidence level Critical value 0.90 2* = 1.645 0.95 2* = 1.960 0.99 2* = 2.576 3897BB.2534628.qx3zay7 Jump to level 1 1 V A poll reported 59% support for a statewide election with a margin of error of 2 1.82 percentage points. 3 How many voters should be sampled for a 90% confidence interval? Round up to the nearest whole number. Ex: 1234 + voters