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
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 y# = 2.576 Start 1 In a poll of 1000 randomly selected voters in a local election, 455 voters were in favor of fire department bond measures. 3 What is the sample proportion p? Ex: 0.1230 What is the margin of error m for the 95% confidence level? Ex: 0.12:$
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