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

question 51

Short Answer

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

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