101 7-2 Challenge Acavities: Proporti Section 72 - MAT 240; Applied 5 X book/MAT-240-J4382-OL-TRAD-UG.22EW4/chapter/7/section/2 tics home > 7.2: Confidence intervals for population proportions zyBooks 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* - 2.576 897 88 2534628/qx3zay7 V Jump to level 1 V A poll reported 62% support for a statewide election with a margin of error of 2.2 percentage points. How many voters should be sampled for a 95%% confidence interval? Round up to the nearest whole number. Ex: 1234 voters Check Next