Question

Doubt on conditional expected value

score 48 · Answer 1 · 2020-05-24 09:39:45

48

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Doubt on conditional expected value

Published on 24 May 2020 - 9:39

score 54 · Answer 2 · 2026-04-01 03:05:51

54

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Given a martingale $Y=\mathbb{E}\{M_n|\mathcal{F}_n\}$, why does the below red inequality hold true?

Published on 01 Apr 2026 - 3:05

score 320 · Answer 3 · 2026-03-28 19:30:51

320

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Finding the expected value of the sum of four dice with only the largest three counting

Published on 28 Mar 2026 - 19:30

score 46 · Answer 4 · 2020-05-24 15:54:55

46

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Expectation of maximum over an infinite sequence of sub-Guassian random variables

Published on 24 May 2020 - 15:54

score 45 · Answer 5 · 2026-03-25 17:44:38

45

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In a casino a player can win 1 euro with a probability of 18/28 and loses 1 euro with a probability of 20/38.

Published on 25 Mar 2026 - 17:44

score 563 · Answer 6 · 2026-03-25 19:06:59

563

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Some doubts in a part of the proof of Backwards Martingale Convergence Theorem (Jacod-Protter)

Published on 25 Mar 2026 - 19:06

score 56 · Answer 7 · 2020-05-25 07:18:39

56

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expected value before product is less than N

Published on 25 May 2020 - 7:18

score 774 · Answer 8 · 2026-03-29 18:08:17

774

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Variance of Poisson distribution multiplied by a constant

Published on 29 Mar 2026 - 18:08

score 53 · Answer 9 · 2020-05-25 11:50:52

53

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Cossine of a standard Normal distribution

Published on 25 May 2020 - 11:50

score 39 · Answer 10 · 2026-03-29 18:07:34

39

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Expected value of different dice roll results given number of rolls

Published on 29 Mar 2026 - 18:07

score 23 · Answer 11 · 2020-05-25 17:27:35

23

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Question about $x \in \text{Img}(X)$

Published on 25 May 2020 - 17:27

score 91 · Answer 12 · 2020-05-25 20:23:32

91

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Calculating $E[Z(Z-1)(Z-2)(Z-3)]$ where $Z$ is Poisson

Published on 25 May 2020 - 20:23

score 52 · Answer 13 · 2020-05-26 04:04:56

52

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partial derivative of a function of two R.V.s respect to the expected value of one R.V.

Published on 26 May 2020 - 4:04

score 42 · Answer 14 · 2026-04-03 01:03:20

42

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Is it true that $\mathbb{E}\{X\}=\mathbb{E}\{Y\}$ $\Rightarrow$ $\mathbb{E}\{X|\mathcal{F}\}=\mathbb{E}\{Y|\mathcal{F}\}$?

Published on 03 Apr 2026 - 1:03

score 55 · Answer 15 · 2026-03-26 04:32:48

55

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Is it true that $\mathbb{E}\{X_n\}=\mathbb{E}\{X_m\}\Rightarrow\mathbb{E}\{X_n|\mathcal{F}_m\}=\mathbb{E}\{X_m|\mathcal{F}_m\}=X_m$?

Published on 26 Mar 2026 - 4:32

List Question

Doubt on conditional expected value

Given a martingale $Y=\mathbb{E}\{M_n|\mathcal{F}_n\}$, why does the below red inequality hold true?

Finding the expected value of the sum of four dice with only the largest three counting

Expectation of maximum over an infinite sequence of sub-Guassian random variables

In a casino a player can win 1 euro with a probability of 18/28 and loses 1 euro with a probability of 20/38.

Some doubts in a part of the proof of Backwards Martingale Convergence Theorem (Jacod-Protter)

expected value before product is less than N

Variance of Poisson distribution multiplied by a constant

Cossine of a standard Normal distribution

Expected value of different dice roll results given number of rolls

Question about $x \in \text{Img}(X)$

Calculating $E[Z(Z-1)(Z-2)(Z-3)]$ where $Z$ is Poisson

partial derivative of a function of two R.V.s respect to the expected value of one R.V.

Is it true that $\mathbb{E}\{X\}=\mathbb{E}\{Y\}$ $\Rightarrow$ $\mathbb{E}\{X|\mathcal{F}\}=\mathbb{E}\{Y|\mathcal{F}\}$?

Is it true that $\mathbb{E}\{X_n\}=\mathbb{E}\{X_m\}\Rightarrow\mathbb{E}\{X_n|\mathcal{F}_m\}=\mathbb{E}\{X_m|\mathcal{F}_m\}=X_m$?

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