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Outcomes 0, 1, 2 occur with chances 1/4, 1/2, 1/4. Compute the variance.
A1
B1/4
C3/4
D1/2
Answer & Solution
Correct answer: D. 1/2
The mean is 1, so Var = (1/4)(1) + 0 + (1/4)(1) = 1/2.
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