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Probability & Statistics
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Moments & Estimation
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Expectation & variance
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806.
Variance Formula
easy
Which of the following is the correct formula for the variance of a random variable X?
A
E[X²] + (E[X])²
B
E[X]² - E[X²]
C
E[(X - E[X])²]
D
E[X² + E[X]]
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