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Hi,
Using the direct calculation method, I am not seeing how E(N²) is calculated as: 0.5(5² + 5) + 0.5(1² + 1) = 16 In my mind, this would've been: 0.5(5²) + 0.5(1²) = 13 I do see how the double expectation theorem works though. What am I not understanding? |
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