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Solved: If a ? X ? b, show that a ? E(X) ? b.
Chapter 3, Problem 45E(choose chapter or problem)
QUESTION:
If a ≤ X ≤ b, show that a ≤ E(X) ≤ b.
Questions & Answers
QUESTION:
If a ≤ X ≤ b, show that a ≤ E(X) ≤ b.
ANSWER:Answer :
Step 1 of 1 :
we have to show a ≤ E(X) ≤ b from a ≤ X ≤ b
X can take values which lie in the range [a,b]
E(x) = x P(x)
Let ,