Question

Does conditional expectation imply anything about the expected value of the product of two random variables?

score 106 · Answer 1 · 2018-11-20 19:10:48

106

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Does conditional expectation imply anything about the expected value of the product of two random variables?

Published on 20 Nov 2018 - 19:10

score 535 · Answer 2 · 2026-03-26 03:11:41

535

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Given that $X \sim \operatorname{Binomial}(n,p)$, Find $\mathbb{E}[X(X-1)(X-2)(X-3)]$

Published on 26 Mar 2026 - 3:11

score 692 · Answer 3 · 2018-11-21 13:14:46

692

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Expected number of a Poisson-distributed variable

Published on 21 Nov 2018 - 13:14

score 85 · Answer 4 · 2018-11-21 13:38:25

85

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Expected waiting time at tennis court [simplified version]

Published on 21 Nov 2018 - 13:38

score 37 · Answer 5 · 2026-03-25 13:53:17

37

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$\mathbb E[S_n'^4]\le C\cdot n^2$

Published on 25 Mar 2026 - 13:53

score 84 · Answer 6 · 2026-03-27 05:38:14

84

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Finding the maximum of $\mathbb{E}_{\mathbb{Q}_v}\big[\max\{K-(1+R)s_0,0\}\big]$

Published on 27 Mar 2026 - 5:38

score 385 · Answer 7 · 2018-11-21 23:13:31

385

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Expected value for randomly assigned sum and product of random variables

Published on 21 Nov 2018 - 23:13

score 1.3k · Answer 8 · 2018-11-22 12:23:16

1.3k

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Expected Value at the end of an equal probability game

Published on 22 Nov 2018 - 12:23

score 238 · Answer 9 · 2018-11-22 12:45:49

238

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Show that the expected value of $X$ is equal to $E(x)$

Published on 22 Nov 2018 - 12:45

score 78 · Answer 10 · 2026-03-25 19:01:05

78

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Expectation property of moment generating function

Published on 25 Mar 2026 - 19:01

score 48 · Answer 11 · 2018-11-23 04:27:53

48

Views

Expected ratio of turns for complicated ball drawing game

Published on 23 Nov 2018 - 4:27

score 496 · Answer 12 · 2018-11-23 15:22:35

496

Views

Why do choirs work?

Published on 23 Nov 2018 - 15:22

score 605 · Answer 13 · 2018-11-23 21:24:19

605

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Expected number of steps to get N red balls choosing K at a time

Published on 23 Nov 2018 - 21:24

score 590 · Answer 14 · 2018-11-24 03:10:29

How to prove that exponential of an expected value of a variable is less than the expected value of the exponential of the variable

score 497 · Answer 15 · 2018-11-25 11:19:35

497

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Expectation of the power of a uniform r.v.

Published on 25 Nov 2018 - 11:19

List Question

Does conditional expectation imply anything about the expected value of the product of two random variables?

Given that $X \sim \operatorname{Binomial}(n,p)$, Find $\mathbb{E}[X(X-1)(X-2)(X-3)]$

Expected number of a Poisson-distributed variable

Expected waiting time at tennis court [simplified version]

$\mathbb E[S_n'^4]\le C\cdot n^2$

Finding the maximum of $\mathbb{E}_{\mathbb{Q}_v}\big[\max\{K-(1+R)s_0,0\}\big]$

Expected value for randomly assigned sum and product of random variables

Expected Value at the end of an equal probability game

Show that the expected value of $X$ is equal to $E(x)$

Expectation property of moment generating function

Expected ratio of turns for complicated ball drawing game

Why do choirs work?

Expected number of steps to get N red balls choosing K at a time

How to prove that exponential of an expected value of a variable is less than the expected value of the exponential of the variable

Expectation of the power of a uniform r.v.

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