If the difference between expectation of the square of a random variable (E[X²]) and the square of the expectation of the random variable (E[X])² is denoted by R, then?

If the difference between expectation of the square of a random variab

1.	If the difference between expectation of the square of a random variable (E[X²]) and the square of the expectation of the random variable (E[X])² is denoted by R, then?
A.	R = 0
B.	R < 0
C.	R >= 0
D.	R > 0
Answer» D. R > 0

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If the difference between expectation of the square of a random variable (E[X²]) and the square of the expectation of the random variable (E[X])² is denoted by R, then?

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