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Let Y Be a Random Variable E[(Y−μY)2]\sqrt { E \left[ \left( Y - \mu _ { Y } \right) ^ { 2 } \right] }

Question 51

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Let Y be a random variable.Then var(Y)equals a. E[(Y−μY)2]\sqrt { E \left[ \left( Y - \mu _ { Y } \right) ^ { 2 } \right] } .
b. E[∣(Y−μY)∣]E \left[ \left| \left( Y - \mu _ { Y } \right) \right| \right] .
c. E[(Y−μY)2]E \left[ \left( Y - \mu _ { Y } \right) ^ { 2 } \right] .
d. E[(Y−μY)]E \left[ \left( Y - \mu _ { Y } \right) \right] .

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