Critical values for quick reference during this activity. Condence level Critical value 0.90 2* = 1.645 32928 2594236Lx3 2E5\"? Jump to level '1 A poll reported 33% support for a statewide election with a margin of error of 3.33 percentage points. How many voters should be sampled for a 90% condence interval? Round up to the nearest whole number. EX: 1234 voters