Prob 5 9 Variance of a Geometric Random Variable

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Great Job! Thanks so much for your time! Helped me revise my stats.

pwillzx
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the expectation of i-1 and expectation of j are not the same so for EX^2 of i and j are also not the same RV X, you have to put X1 and X2 thus it becomes EX1 and EX2. You can show the answer in any way but it should be valid!

funnywaves
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I have a question that why you can say that E(J^2) equal to E(X^2)

harukayu