5.3.1: Confidence intervals for population proportions.

CHALLENGE ACTIVITY 5.3.1: 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 377102 1927410.qx3zqy7 Jump to level 1 In a poll of 1000 randomly selected voters in a local election, 989 voters were in favor of fire department bond measures. + 0 - 0 What is the sample proportion p? Ex: 0.123 What is the margin of error m for the 90% confidence level? Ex: 0.123 1 2 3 4 Check Next Feedback