Question

Variance and Correlation of Linear Combinations of Random Variables

score 1.1k · Answer 1 · 2026-04-01 05:03:07

1.1k

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Variance and Correlation of Linear Combinations of Random Variables

Published on 01 Apr 2026 - 5:03

score 65 · Answer 2 · 2017-11-28 07:19:18

65

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Calculate the following covariance

Published on 28 Nov 2017 - 7:19

score 45 · Answer 3 · 2026-03-25 17:25:57

45

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Sufficient condtion for the existence of E[|XY|]

Published on 25 Mar 2026 - 17:25

score 1.2k · Answer 4 · 2017-11-30 12:09:58

1.2k

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Why is the covariance of the hypergeometric distribution not dependent i and j?

Published on 30 Nov 2017 - 12:09

score 178 · Answer 5 · 2017-12-01 12:09:22

178

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Do we really need finite variances $\mathrm{Var}(X)$ and $\mathrm{Var}(Y)$ in the definition of covariance $\mathrm{Cov}(X,Y)$?

Published on 01 Dec 2017 - 12:09

score 888 · Answer 6 · 2017-12-02 07:43:28

888

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Covariance function of Brownian motion process: $Y(t) = X^2(t)$

Published on 02 Dec 2017 - 7:43

score 43 · Answer 7 · 2026-03-30 15:34:49

43

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How to prove that $r(s,t)=exp{(\lambda\ (exp{(i(s-t))}-1))}$ ($\lambda$ is positive) is covariance function of some stochastic process?

Published on 30 Mar 2026 - 15:34

score 1k · Answer 8 · 2017-12-02 13:53:40

1k

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Covariance of two gamma distributions.

Published on 02 Dec 2017 - 13:53

score 57 · Answer 9 · 2026-03-30 15:35:00

57

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Find Cov$(N(t),\sum_{i=1}^{N(t)}X_i)$

Published on 30 Mar 2026 - 15:35

score 1.8k · Answer 10 · 2026-04-01 04:40:34

1.8k

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Covariance between given iid random variable and sample average

Published on 01 Apr 2026 - 4:40

score 168 · Answer 11 · 2017-12-09 06:16:55

168

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Autocovariance of a Product of Zero-Mean, Wide-Sense Stationary Gaussian Random Process?

Published on 09 Dec 2017 - 6:16

score 137 · Answer 12 · 2017-12-12 08:08:18

137

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FInd the number of students for an average score

Published on 12 Dec 2017 - 8:08

score 844 · Answer 13 · 2017-12-14 03:03:19

844

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Covariance matrix multiplied by eigenvector

Published on 14 Dec 2017 - 3:03

score 437 · Answer 14 · 2026-04-01 06:29:07

437

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Finding E[XY] to be used in Covariance in a joint probability question

Published on 01 Apr 2026 - 6:29

score 2.1k · Answer 15 · 2026-04-01 06:30:22

2.1k

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roll a dice two times. Calculate covariance $\mathbb{C}ov(X,Y)$ . Calculate correlation coefficient.

Published on 01 Apr 2026 - 6:30

List Question

Variance and Correlation of Linear Combinations of Random Variables

Calculate the following covariance

Sufficient condtion for the existence of E[|XY|]

Why is the covariance of the hypergeometric distribution not dependent i and j?

Do we really need finite variances $\mathrm{Var}(X)$ and $\mathrm{Var}(Y)$ in the definition of covariance $\mathrm{Cov}(X,Y)$?

Covariance function of Brownian motion process: $Y(t) = X^2(t)$

How to prove that $r(s,t)=exp{(\lambda\ (exp{(i(s-t))}-1))}$ ($\lambda$ is positive) is covariance function of some stochastic process?

Covariance of two gamma distributions.

Find Cov$(N(t),\sum_{i=1}^{N(t)}X_i)$

Covariance between given iid random variable and sample average

Autocovariance of a Product of Zero-Mean, Wide-Sense Stationary Gaussian Random Process?

FInd the number of students for an average score

Covariance matrix multiplied by eigenvector

Finding E[XY] to be used in Covariance in a joint probability question

roll a dice two times. Calculate covariance $\mathbb{C}ov(X,Y)$ . Calculate correlation coefficient.

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