Critical values for quick reference during this activity. Confidence level | Critical value 0.90 z* = 1.645 0.95 2* = 1.960 0.99 2*= 2.576 387884.2532066.qx3zay7 Jump to level 1 1 In a poll of 1000 randomly selected voters in a local election, 739 voters were 2 against school bond measures. 3 What is the sample proportion p? Ex: 0.123 4 What is the margin of error m for the 99% confidence level? Ex: 0. 123+