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CHALLENGE ACTIVITY 7.2.1: Confidence intervals for population proportions. Critical values for quick reference during this activity. Confidence level | Critical value 0.90 = 1.645 0.95

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CHALLENGE ACTIVITY 7.2.1: Confidence intervals for population proportions. Critical values for quick reference during this activity. Confidence level | Critical value 0.90 = 1.645 0.95 2* = 1.960 0.99 z* = 2.576 402294.2602416.qx3zqy7 Jump to level 1 A poll for a statewide election has a margin of error of 3.38 percentage points. How many voters should be sampled for a 99% confidence interval? Round up to the nearest whole number. Ex: 1234 + voters

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