Question
7.2.1: Confidence intervals for population proportions Question 4 Critical values for quick reference during this activity. Confidence level Critical value 0.90 z=1.645 0.95 z=1.960 0.99
7.2.1: Confidence intervals for population proportions
Question 4
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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A poll for a statewide election has a margin of error of 3.61 percentage points. How many voters should be sampled for a 90% confidence interval? Round up to the nearest whole number.
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College Algebra
Authors: Cynthia Y Young
4th Edition
1119320682, 9781119320685
