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Equivalence of two formulas for variance and covariance

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#probability #statistics #expectation #covariance
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Is the positive part of a covariance stationary process also stationary?

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#time-series #covariance #stationary-processes #positive-characteristic
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3-sigma Ellipse, why axis length scales with square root of eigenvalues of covariance-matrix

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#linear-algebra #eigenvalues-eigenvectors #numerical-linear-algebra #covariance
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Variance of the sum of sample means

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#probability #statistics #random-variables #statistical-inference #covariance
57
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statistics basic question on covariance

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#statistics #random-variables #contest-math #statistical-inference #covariance
120
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Simple Conditional Variance Proof Question

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#statistics #self-learning #covariance
569
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Checking hand manipulations of matrices

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#matrices #correlation #covariance #invariance
2.9k
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What is the sample variance-covariance matrix?

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#matrices #covariance
23
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What type of distribution can be used to describe a game with positive expected winnings?

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#probability-distributions #normal-distribution #covariance
172
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Evaluate this covariance matrix.

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#linear-algebra #random-variables #covariance
96
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Covariance matrix computed based on a covariance function

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#eigenvalues-eigenvectors #correlation #covariance
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Difference between identity and diagonal covariance matrices

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#probability #statistics #correlation #covariance
116
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Proving a theorem about covariance matrix

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#matrices #statistics #covariance
80
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Find the type of noise a random variable should be contaminated with, such that certain properties are satisfied.

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#random-variables #covariance #noise
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Estimate large covariance matrix using few samples.

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#statistics #normal-distribution #estimation #covariance

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