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Compute mean and covariance matrix of $\bar{X}$ from a simple random sample

score 223 · Answer 1 · 2026-03-25 15:54:40

223

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Compute mean and covariance matrix of $\bar{X}$ from a simple random sample

Published on 25 Mar 2026 - 15:54

score 506 · Answer 2 · 2018-12-10 01:38:55

506

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Why the standard deviation of discrete random variable is not divided by n?

Published on 10 Dec 2018 - 1:38

score 923 · Answer 3 · 2018-12-10 20:39:42

923

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How to find the probability of a 'mean shift' in a random process?

Published on 10 Dec 2018 - 20:39

score 53 · Answer 4 · 2018-12-11 10:08:46

53

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Does $\alpha_j-(\Pi \alpha_i)^{1/d}=\beta_j-(\Pi \beta_i)^{1/d} $ force $\alpha_i=\beta_i$?

Published on 11 Dec 2018 - 10:08

score 61 · Answer 5 · 2018-12-13 12:01:07

61

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Definition of conditional mean of $ E[g(Y)X|Y=y]$ where Y is discrete.

Published on 13 Dec 2018 - 12:01

score 2.1k · Answer 6 · 2018-12-14 09:17:53

2.1k

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What can I say about expected value of expected value of x given y: $E[E[X|Y]]$

Published on 14 Dec 2018 - 9:17

score 128 · Answer 7 · 2018-12-14 21:04:39

128

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Prove / Disprove that $E\big((X−a)^4\big)$ is minimized when $a=E(X)$.

Published on 14 Dec 2018 - 21:04

score 73 · Answer 8 · 2018-12-17 20:50:52

73

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The average of the items of $(0,10]$

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score 122 · Answer 9 · 2018-12-18 10:12:43

122

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Published on 18 Dec 2018 - 10:12

score 30 · Answer 10 · 2026-03-25 04:38:26

30

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Published on 25 Mar 2026 - 4:38

score 49 · Answer 11 · 2019-01-04 09:56:49

49

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Published on 04 Jan 2019 - 9:56

score 633 · Answer 12 · 2019-01-04 10:00:53

633

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score 2.3k · Answer 13 · 2019-01-04 22:36:52

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score 1.7k · Answer 14 · 2019-01-06 11:51:23

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Published on 06 Jan 2019 - 11:51

score 642 · Answer 15 · 2026-03-25 18:52:11

642

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Mean vector and covariance matrix

Published on 25 Mar 2026 - 18:52

List Question

Compute mean and covariance matrix of $\bar{X}$ from a simple random sample

Why the standard deviation of discrete random variable is not divided by n?

How to find the probability of a 'mean shift' in a random process?

Does $\alpha_j-(\Pi \alpha_i)^{1/d}=\beta_j-(\Pi \beta_i)^{1/d} $ force $\alpha_i=\beta_i$?

Definition of conditional mean of $ E[g(Y)X|Y=y]$ where Y is discrete.

What can I say about expected value of expected value of x given y: $E[E[X|Y]]$

Prove / Disprove that $E\big((X−a)^4\big)$ is minimized when $a=E(X)$.

The average of the items of $(0,10]$

Which mean to use to find the average of measurements given in the form of "per period"

What questions lead to different representative statistics?

Statistical problem: Scores, Weights and Averages

Generalized AM-GM Inequality

Range of Data Values That Includes 95% of my Data

What is the mathematical meaning of this question?

Mean vector and covariance matrix

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