The probability distribution of X is shown.
What is E(X)?
- Acheck_circle
1.1
- B
0.9
- C
1.0
- D
1.5
Explanation
E(X) = 0(0.2) + 1(0.5) + 2(0.3) = 0 + 0.5 + 0.6 = 1.1.
Mean and Standard Deviation of Random Variables
AP Statistics· difficulty 2/5
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