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Math 240 ctivities CHALLENGE ACTIVITY 7.2.1: Confidence intervals for population proportions. Critical values for quick reference during this activity. Confidence level Critical value 0.90 z*

Math 240

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ctivities CHALLENGE ACTIVITY 7.2.1: Confidence intervals for population proportions. Critical values for quick reference during this activity. Confidence level Critical value 0.90 z* = 1.645 0.95 z* = 1.960 0.99 z* = 2.576 Jump to level 1 In a poll of 1000 randomly selected voters in a local election, 559 voters were against fire department bond measures. What is the sample proportion p? Ex: 0.123 What is the margin of error m for the 99% confidence level? Ex: 0.123

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