A random variable X has Var(X) = 0.49.
What is the standard deviation of X?
- A
0.49
- B
1.4
- C
0.24
- Dcheck_circle
0.7
Explanation
SD(X) = sqrt(Var(X)) = sqrt(0.49) = 0.7.
Mean and Standard Deviation of Random Variables
AP Statistics· difficulty 3/5
Want 10 more like this — adaptive to your weak spots?