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 376960.2353960.qx3zay7 V Jump to level 1 - In a poll of 1000 randomly selected voters in a local election, 166 voters were 2 in favor of fire department bond measures. 3 What is the sample proportion p? Ex: 0. 123 4 What is the margin of error m for the 90% confidence level? Ex: 0. 1232