Critical values for quick reference during this activity. Confidence level | Critical value 0.90 2* = 1.645 0.95 z* = 1.960 0.99 * = 2.576 270604 2228390.qx3zay7 Jump to level 1 A poll reported 65% support for a statewide election with a margin of error of 4.79 percentage points. How many voters should be sampled for a 99% confidence interval? Round up to the nearest whole number. EX: 1234 $ voters