If n ≥ 30 and _____ then binomial approaches to normal distribution?
Correct answer: B. p = q
- A. q/p
- B. p = q
- C. pq
- D. p = n
Explanation
When p = q = 0.5 and n is at least 30, both np and nq are sufficiently large, making the binomial distribution reasonably close to normal. More generally, the approximation is judged by np and nq rather than by p = q alone.
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