Question

Expected value problem: flip $6$ fair coins before we obtain $3$ heads and $3$ tails?

score 419 · Answer 1 · 2016-02-09 04:19:37

419

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Expected value problem: flip $6$ fair coins before we obtain $3$ heads and $3$ tails?

Published on 09 Feb 2016 - 4:19

score 166 · Answer 2 · 2016-02-09 12:19:39

166

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Let $E(X)=\mu$ and $\operatorname{Var}(X)=\sigma^2$. If $E(Y|X)=a+bX$, find $E(XY)$ as a function of $\mu$ and $\sigma$.

Published on 09 Feb 2016 - 12:19

score 928 · Answer 3 · 2026-03-31 10:47:54

928

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Ms. A selects a number $X$ randomly from the uniform distribution on $[0, 1]$. Then Mr. B repeatedly, and independently, draws numbers.

Published on 31 Mar 2026 - 10:47

score 436 · Answer 4 · 2016-02-10 10:12:55

436

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Expectation of scaled sum of squares of iid random variables

Published on 10 Feb 2016 - 10:12

score 1.5k · Answer 5 · 2026-04-02 04:48:41

1.5k

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The skewness coefficient for given pdf?

Published on 02 Apr 2026 - 4:48

score 315 · Answer 6 · 2026-04-01 10:00:27

315

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Expected payment of a roll of dice with rerolls

Published on 01 Apr 2026 - 10:00

score 77 · Answer 7 · 2016-02-13 07:51:04

77

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Expected number of jumps to just exceed $(1-\rho)$ quantile in the line segment $[0, 1]$

Published on 13 Feb 2016 - 7:51

score 68 · Answer 8 · 2016-02-13 09:42:49

68

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Inequality involving Expectation 3

Published on 13 Feb 2016 - 9:42

score 2.1k · Answer 9 · 2026-04-03 05:17:04

2.1k

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How to solve $\text{covariance}(X,Y)$ if $Y=X^2$?

Published on 03 Apr 2026 - 5:17

score 45 · Answer 10 · 2016-02-13 20:56:32

45

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Expected value prove problem

Published on 13 Feb 2016 - 20:56

score 221 · Answer 11 · 2026-03-29 16:44:32

221

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AM-GM Inequality Confusing

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score 977 · Answer 12 · 2026-04-02 11:33:30

977

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confused about meaning of a expectation of a function

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score 1.5k · Answer 13 · 2026-04-01 08:00:41

1.5k

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Central limit theorem(Expectation)

Published on 01 Apr 2026 - 8:00

score 3.1k · Answer 14 · 2016-02-15 22:06:18

3.1k

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Intuitive reason why sampling without replacement doesnt change expectation?

Published on 15 Feb 2016 - 22:06

score 1k · Answer 15 · 2026-04-02 11:25:07

1k

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Finite mean implies finite variance proof

Published on 02 Apr 2026 - 11:25

List Question

Expected value problem: flip $6$ fair coins before we obtain $3$ heads and $3$ tails?

Let $E(X)=\mu$ and $\operatorname{Var}(X)=\sigma^2$. If $E(Y|X)=a+bX$, find $E(XY)$ as a function of $\mu$ and $\sigma$.

Ms. A selects a number $X$ randomly from the uniform distribution on $[0, 1]$. Then Mr. B repeatedly, and independently, draws numbers.

Expectation of scaled sum of squares of iid random variables

The skewness coefficient for given pdf?

Expected payment of a roll of dice with rerolls

Expected number of jumps to just exceed $(1-\rho)$ quantile in the line segment $[0, 1]$

Inequality involving Expectation 3

How to solve $\text{covariance}(X,Y)$ if $Y=X^2$?

Expected value prove problem

AM-GM Inequality Confusing

confused about meaning of a expectation of a function

Central limit theorem(Expectation)

Intuitive reason why sampling without replacement doesnt change expectation?

Finite mean implies finite variance proof

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