A poll reported 30% support for a statewide election with a margin of error of 2.57 percentage points.

Critical values for quick reference during this activity. Condence level Critical value 0.90 2* = 1.045 0.95 3* : 1.960 0.99 2* = 2.570 " Jump to level 1 A poll reported 30% support for a statewide election with a margin of error of 2.57 percentage points. l-lom.r many voters should be sampled for a 95% condence interval? Round up to the nearest whole number. Ex: 1284 voters