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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 2* = 2.576 V Jump to level 1 In a poll of 1000 randomly selected voters in a local election, 414 voters were 2 against fire department bond measures 3 What is the 99% confidence interval? [ Ex: 0.123 # Ex: 0.123 [smaller value, larger value]