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 270604.2192002 qx3zay7 Jump to level 1 A poll reported 51% support for a statewide election with a margin of error of 1.58 percentage points. How many voters should be sampled for a 95% confidence interval? Round up to the nearest whole number. EX: 1234 + voters