Question
Confidence level Critical value 0.90 z=1.645 0.95 z=1.960 0.99 z=2.576 A poll reported 60% support for a statewide election with a margin of error of
| Confidence level | Critical value |
|---|---|
0.90 | z=1.645 |
0.95 | z=1.960 |
0.99 | z=2.576 |
A poll reported 60% support for a statewide election with a margin of error of 3.65 percentage points. How many voters should be sampled for a 95% confidence interval? Round up to the nearest whole number
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Algebra
Authors: Marvin L Bittinger
12th Edition
0321922913, 9780321922915
