95% confidence limits for P are _________________?
Correct answer: D. P±1.96√p2q2/n
- A. P±2.18√p2q2/n
- B. P±1.65(pq/n)
- C. P±1.96 p2q2/√n
- D. P±1.96√p2q2/n
Explanation
For a population proportion, the 95% confidence interval is estimated proportion ± 1.96√(pq/n), where q = 1 − p. Option d is evidently intended, although the powers or subscripts in the displayed formula appear garbled.
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