X is Binomial(n=20, p=0.3).
What is the standard deviation of X?
- Acheck_circle
sqrt(4.2)
- B
sqrt(20)
- C
sqrt(6)
- D
4.2
Explanation
SD = sqrt(np(1-p)) = sqrt(20 * 0.3 * 0.7) = sqrt(4.2).
Parameters for a Binomial Distribution
AP Statistics· difficulty 3/5
Want 10 more like this — adaptive to your weak spots?