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 A poll for a statewide election has a margin of error of 4.22 percentage points. How many voters should be sampled for a 95% confidence interval? Round up to the nearest whole number. Ex: 1234 voters

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Critical values for quick reference during this activity.
Confidence level Critical value
0.90
z* = 1.645
0.95
1.960
||
0.99
z*
2.576
Jump to level 1
A poll for a statewide election has a margin of error of 4.22 percentage points.
How many voters should be sampled for a 95% confidence interval? Round up
to the nearest whole number.
Ex: 1234
voters
Transcribed Image Text:Critical values for quick reference during this activity. Confidence level Critical value 0.90 z* = 1.645 0.95 1.960 || 0.99 z* 2.576 Jump to level 1 A poll for a statewide election has a margin of error of 4.22 percentage points. How many voters should be sampled for a 95% confidence interval? Round up to the nearest whole number. Ex: 1234 voters
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