Roll a fair die. E(X) =
- A
2.5
- B
3
- C
4
- Dcheck_circle
3.5
Explanation
(1+2+3+4+5+6)/6 = 21/6 = 3.5.
Mean and Standard Deviation of Random Variables
AP Statistics· difficulty 3/5
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AP Statistics· difficulty 3/5
Roll a fair die. E(X) =
2.5
3
4
3.5
Explanation
(1+2+3+4+5+6)/6 = 21/6 = 3.5.
Want 10 more like this — adaptive to your weak spots?