O Menu Zy Section 7.2 - MAT 240: App X + Q X > =zyBooks My library > MAT 240: Applied Statistics home > 7.2: Confidence intervals for population proportions zyBooks catalog ? Help/FAQ CHALLENGE ACTIVITY 7.2.1: Confidence intervals for population proportions. Critical values for quick reference during this activity. Confidence level | Critical value 0.90 2* = 1.645 0.95 z* = 1.960 0.99 z* = 2.576 387962.2528628.qx3zgy7 Jump to level 1 A poll for a statewide election has a margin of error of 2.35 percentage points. - WK NK - K How many voters should be sampled for a 95% confidence interval? Round up to the nearest whole number. Ex: 1234 voters 1 2 3 4 Check Next Feedback? 5:55 PM 4/16/2022