X is a discrete random variable with the following PMF: P(X = 1.4) = 0.25 P(X = -9.7) = 0.25 P(X = 10) = 0.5 Find the standard deviation of X.
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X is a discrete random variable with the following PMF:
- P(X = 1.4) = 0.25
- P(X = -9.7) = 0.25
- P(X = 10) = 0.5
Find the standard deviation of X.
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