Mathematics · Statistics
With usual notations, the 95% confidence limits for the difference between two population proportions (p1 - p2) is given by which of the following expressions?
- 1(p1 - p2) ± 1.96 √p1q1n1 - p2q2n2
- 2(p1 + p2) ± 1.96 √p1q1n1 - p2q2n2
- 3(p1 + p2) ± 1.96 √p1q1n1 + p2q2n2
- 4(p1 - p2) ± 1.96 √p1q1n1 + p2q2n2✓
Correct answer
(p1 - p2) ± 1.96 √p1q1n1 + p2q2n2
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