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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 2* = 1.960 0.99 z* = 2.576 377222.2338710.qx3zay7 Jump to level 1 In a poll of 1000 randomly selected voters in a local election, 818 voters were in favor of school bond measures. What is the 90% confidence interval? [ Ex: 0.123 , Ex: 0. 123@ ] [smaller value, larger value] 2 Check Next Feedback? CHALLENGE ACTIVITY 7.2.2: Confidence intervals for population proportions (two-tailed) 377222 2838710 qx3zqy7 Start