D2L Resources: Proportion Confidence Section 7.2 - MAT 240: Applied St X Course Hero x Microsoft Office Home X + X - - C D a learn.zybooks.com/zybook/MAT-240-J1578-OL-TRAD-UG.22EW1/chapter/7/section/2 =zyBooks My library > MAT 240: Applied Statistics home > 7.2: Confidence intervals for population proportions zyBooks catalog ? Help/FAQ & Steve Atwell 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 2* = 2.576 426854.2603902.qx3zqy7 Jump to level 1 A poll reported 47% support for a statewide election with a margin of error of + " ~