If E(X)=4 and E(X²)=20, then Var(X) is:
If E(X)=4 and E(X²)=20, then Var(X) is:
- A. 4
- B. 16
- C. 20
- D. 36
Answer: A) 4
Explanation: Var(X)=20−4²=4.
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If E(X)=4 and E(X²)=20, then Var(X) is:
Answer: A) 4
Explanation: Var(X)=20−4²=4.
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