A binomial X has n = 100, p = 0.5.
Using normal approximation, what are mean and SD?
- A
mean 50, SD 25
- B
mean 50, SD 50
- C
mean 100, SD 5
- Dcheck_circle
mean 50, SD 5
Explanation
Mean = np = 50. SD = sqrt(np(1-p)) = sqrt(25) = 5.
Introduction to the Binomial Distribution
AP Statistics· difficulty 4/5
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