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Expectation, Variance, Covariance, and Moments
Expectation, Variance, Covariance, and Moments
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What does E[X] represent for a discrete random variable X?
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A.
The median (50th percentile) of the probability distribution of X
B.
The most likely value X can take, called the mode of the distribution
C.
The probability-weighted average of all possible values
D.
The variance of X divided by the number of samples collected
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