Question
A poll for a statewide election has a margin of error of 4.43 percentage points. How many voters should be sampled for a 90% confidence
A poll for a statewide election has a margin of error of 4.43 percentage points. How many voters should be sampled for a 90% confidence interval? Round up to the nearest whole number.
voters ?
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 |
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Precalculus Enhanced With Graphing Utilities (Subscription)
Authors: Michael Sullivan, Michael Sullivan III
7th Edition
0134273125, 9780134273129
