List questions from expected-value

Published on 02 May 2020 - 17:17

71

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Conflicting definitions of the sum of random variables in proofs of additive property of expected value

Published on 02 May 2020 - 17:34

58

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Can I figure out $E(X)$ from $E(X^2)$?

Published on 02 May 2020 - 19:07

27

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how to compute expectation of $R_1R_2$ when $R_1$ and $R_2$ are independent?

Published on 03 May 2020 - 13:03

224

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Conditional expectation of X given X and Y

Published on 28 Mar 2026 - 23:57

302

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Expected number of cards drawn before the first ace

Published on 03 May 2020 - 20:11

60

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What is $E(\min(X_0+\cdots+X_n,m))$ for large $n$ and $m$s?

Published on 31 Mar 2026 - 12:20

674

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Third Moment of Expectation?

Published on 30 Mar 2026 - 0:18

85

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Does $\mathbb{E}[\max_{1\leq i,j \leq N}{|Y_i-Y_j|}] = 2\mathbb{E}[\max_{1\leq i,j \leq N} Y_i]$ where $Y_i \sim N(0,1)$?

Published on 04 May 2020 - 15:26

268

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Backwards submartingale is a supermartingale?

Published on 31 Mar 2026 - 22:24

776

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Expectation of Absolute Deviation From Mean

Published on 27 Mar 2026 - 22:03

68

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Exploring Expectation Identity

Published on 27 Mar 2026 - 14:57

37

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Expected value of $\mathbb E[C^\bar X]$

Published on 29 Mar 2026 - 14:57

70

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Expected value of a sure win game

Published on 29 Mar 2026 - 6:28

25

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Expected value when there are two random variables

Published on 05 May 2020 - 16:44

List Question

Prove that the expectation value of $E[(\min(X,Y)^2] < \infty$ is well-defined.

Conflicting definitions of the sum of random variables in proofs of additive property of expected value

Can I figure out $E(X)$ from $E(X^2)$?

how to compute expectation of $R_1R_2$ when $R_1$ and $R_2$ are independent?

Conditional expectation of X given X and Y

Expected number of cards drawn before the first ace

What is $E(\min(X_0+\cdots+X_n,m))$ for large $n$ and $m$s?

Third Moment of Expectation?

Does $\mathbb{E}[\max_{1\leq i,j \leq N}{|Y_i-Y_j|}] = 2\mathbb{E}[\max_{1\leq i,j \leq N} Y_i]$ where $Y_i \sim N(0,1)$?

Backwards submartingale is a supermartingale?

Expectation of Absolute Deviation From Mean

Exploring Expectation Identity

Expected value of $\mathbb E[C^\bar X]$

Expected value of a sure win game

Expected value when there are two random variables

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