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Confidence level critical value

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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 2* = 2.576 Jump to level 1 V A poll for a statewide election has a margin of error of 2.63 percentage points. 2 V How many voters should be sampled for a 90% confidence interval? Round up 3 to the nearest whole number. 4 Ex: 1234 $ voters 2 3 4 Check Next Feedback?

Reference no: EM132845912

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