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Covariance between $X_i$ and $Y=\sum_{k=-\infty}^{\infty} a_i X_i$

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#probability-distributions #normal-distribution #covariance
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How to find a line that divides a data set with the minimum or maximum variance

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#linear-algebra #computer-science #covariance #variance
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Is cov(x,y) and cov(y,x) the same thing?

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#covariance
92
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Determine $a$ so that $X + 2Y$ and $2X − Y$ become independent.

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#probability #normal-distribution #covariance
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Prove that explanatory variable $x_i$ is uncorrelated with residual $e_i$

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#covariance #correlation #linear-regression
62
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calculate $\operatorname{cov}(X,Y)$ from $f_{x,y}(x,y)$

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#probability #statistics #covariance #bivariate-distributions
27
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Can I work out the variance based on a covariance matrix?

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#probability #covariance
20
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A question on shared variance and covariance

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#statistics #random-variables #covariance #variance
281
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Unbiased estimator of square of covariance

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#statistics #estimation #covariance
51
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Independence of Poisson distributed random variables

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#probability #poisson-distribution #covariance
239
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Covariance of a Lipschitz function

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#linear-algebra #probability #multivariable-calculus #covariance #lipschitz-functions
55
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Finding the minimal variance

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#covariance #variance
460
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computing the inversion of a matrix which is the sum of a Kronecker product and an identity matrix

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#linear-algebra #inverse #covariance #sampling #kronecker-product
329
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Point covariance for a given data set

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#statistics #covariance
69
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Compute $\operatorname{Cov}(X,Y)$ while $X$ is the sum of the two rolls and $Y$ is the number of $2$s in the two rolls

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#probability #covariance

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