Question

How is the variance equivalent to the following?

score 1.4k · Answer 1 · 2026-03-26 22:13:08

1.4k

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How is the variance equivalent to the following?

Published on 26 Mar 2026 - 22:13

score 51 · Answer 2 · 2017-08-22 15:08:43

51

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How to derive the variance of a point estimator that contains another estimator?

Published on 22 Aug 2017 - 15:08

score 35 · Answer 3 · 2017-08-24 09:28:44

35

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I have N measurements whose uncertainties are unknown. What is the variance?

Published on 24 Aug 2017 - 9:28

score 560 · Answer 4 · 2017-08-24 10:03:41

560

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E(X-Y) and var(X-Y) when $X\in Bi(3,\frac{1}{2}), Y \in Ge(\frac{1}{3}), cov(X,Y)=2$.

Published on 24 Aug 2017 - 10:03

score 416 · Answer 5 · 2026-04-01 04:38:30

416

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Why is $(x_i-\bar{x})^2$ in the formula for variance as opposed to $|x_i-\bar{x}|$?

Published on 01 Apr 2026 - 4:38

score 661 · Answer 6 · 2017-08-27 23:15:30

661

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Calculating Covariance and Variance

Published on 27 Aug 2017 - 23:15

score 180 · Answer 7 · 2017-08-28 01:23:28

180

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Covariance and Variance

Published on 28 Aug 2017 - 1:23

score 94 · Answer 8 · 2017-08-29 12:57:46

94

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problem on conditioning in total variance law

Published on 29 Aug 2017 - 12:57

score 456 · Answer 9 · 2026-03-31 23:36:29

456

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The data set $\{x_1,\dots,x_{10}\}$ has a mean $\mu=10$ and a standard deviation $\sigma=3$. Find the value of $\sum_{i=1}^{10}[(x_i-12)^2]$.

Published on 31 Mar 2026 - 23:36

score 77 · Answer 10 · 2017-09-01 04:05:32

77

Views

Bound on variance

Published on 01 Sep 2017 - 4:05

score 41 · Answer 11 · 2017-09-01 18:21:01

41

Views

How to show $\mathrm{Var}(\mathrm{E}(\sum_{i=1}^y X_i|Y)) = \mathrm{E}(X)^2\mathrm{Var}(Y)$

Published on 01 Sep 2017 - 18:21

score 765 · Answer 12 · 2017-09-01 20:04:58

765

Views

Different rules for calculating the variance of a sum

Published on 01 Sep 2017 - 20:04

score 189 · Answer 13 · 2017-09-02 06:35:11

189

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Variance of a random sum, with a random variable as upper limit

Published on 02 Sep 2017 - 6:35

score 164 · Answer 14 · 2026-03-27 16:19:19

164

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Understand the math behind He-Initialization

Published on 27 Mar 2026 - 16:19

score 877 · Answer 15 · 2017-09-05 13:48:53

877

Views

Toss a fair coin n times, getting $N$ heads. Toss it $N$ more times. What is the variance of the total number of heads?

Published on 05 Sep 2017 - 13:48

List Question

How is the variance equivalent to the following?

How to derive the variance of a point estimator that contains another estimator?

I have N measurements whose uncertainties are unknown. What is the variance?

E(X-Y) and var(X-Y) when $X\in Bi(3,\frac{1}{2}), Y \in Ge(\frac{1}{3}), cov(X,Y)=2$.

Why is $(x_i-\bar{x})^2$ in the formula for variance as opposed to $|x_i-\bar{x}|$?

Calculating Covariance and Variance

Covariance and Variance

problem on conditioning in total variance law

The data set $\{x_1,\dots,x_{10}\}$ has a mean $\mu=10$ and a standard deviation $\sigma=3$. Find the value of $\sum_{i=1}^{10}[(x_i-12)^2]$.

Bound on variance

How to show $\mathrm{Var}(\mathrm{E}(\sum_{i=1}^y X_i|Y)) = \mathrm{E}(X)^2\mathrm{Var}(Y)$

Different rules for calculating the variance of a sum

Variance of a random sum, with a random variable as upper limit

Understand the math behind He-Initialization

Toss a fair coin n times, getting $N$ heads. Toss it $N$ more times. What is the variance of the total number of heads?

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