Home * Gradebook X zy Section 5.8 - QNT/275T: Statistic: X Course Hero x + X Cn https://learn.zybooks.com/zybook/ONT_275T_55318202/chapter/5/section/8?content_resource_id=42551263 G S Bookmarks b Suggested Sites Imported From IE | Other favorites =zyBooks My library > QNT/275T: Statistics for Decision Making home > 5.8: Confidence intervals for population proportions zyBooks catalog ? Help/FAQ @ Bill Mccarthy Feedback? CHALLENGE ACTIVITY 5.8.1: 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 380506.1429276.qx3zay7 Jump to level 1 A poll reported 30% support for a statewide election with a margin of error of 1.98 percentage points. -