List questions from expected-value

Published on 27 Mar 2026 - 0:04

857

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Conditional Expected value of the number of coin tosses until two heads are landed.

Published on 02 Apr 2026 - 13:03

183

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Calculating expectation value based on previous expectation value - why exactly is it wrong?

Published on 17 Apr 2020 - 5:22

1.5k

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Can the expectation of a continuous random variable be negative?

Published on 17 Apr 2020 - 6:43

274

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Weighted Poisson random variables

Published on 29 Mar 2026 - 11:41

134

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understanding of difference between weighted variables

Published on 29 Mar 2026 - 11:51

83

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$E \left( \Phi \left( X+ a \sqrt{\frac{V}{n}} \right) \right)=P(T<\frac{a}{\sqrt{1+\sigma^2}})$ where $X\sim N(0 , \sigma^2)$ , $V \sim \chi^2_{n}$

Published on 17 Apr 2020 - 19:12

464

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How does integrating just over the PDF of a random variable give you the expected value of that random variable?

Published on 18 Apr 2020 - 2:09

251

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Finding mean of Reciprocal of Uniform Distribution

Published on 29 Mar 2026 - 12:11

274

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Stochastic domination and expected value

Published on 18 Apr 2020 - 9:15

55

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Expectation of a random variable (R.V.)

Published on 31 Mar 2026 - 23:07

70

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Prove that, $E[\operatorname{Cov}(X,Y|Z)]+\operatorname{Cov}(E[X|Z],E[Y|Z])=\operatorname{Cov}(X,Y)$

Published on 30 Mar 2026 - 16:46

97

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Viewing an integral as an expected value

Published on 18 Apr 2020 - 16:33

214

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$a$ red balls and $b$ blue balls in an urn. Probability when a game lasts forever.

Published on 28 Mar 2026 - 22:13

230

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expected value of minimum of sum of two random variables and a third

Published on 27 Mar 2026 - 12:08

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$k$th Moment of the $j$th Order Statistic

Conditional Expected value of the number of coin tosses until two heads are landed.

Calculating expectation value based on previous expectation value - why exactly is it wrong?

Can the expectation of a continuous random variable be negative?

Weighted Poisson random variables

understanding of difference between weighted variables

$E \left( \Phi \left( X+ a \sqrt{\frac{V}{n}} \right) \right)=P(T<\frac{a}{\sqrt{1+\sigma^2}})$ where $X\sim N(0 , \sigma^2)$ , $V \sim \chi^2_{n}$

How does integrating just over the PDF of a random variable give you the expected value of that random variable?

Finding mean of Reciprocal of Uniform Distribution

Stochastic domination and expected value

Expectation of a random variable (R.V.)

Prove that, $E[\operatorname{Cov}(X,Y|Z)]+\operatorname{Cov}(E[X|Z],E[Y|Z])=\operatorname{Cov}(X,Y)$

Viewing an integral as an expected value

$a$ red balls and $b$ blue balls in an urn. Probability when a game lasts forever.

expected value of minimum of sum of two random variables and a third

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