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How to show that $E([X|Y])^{2} = E[X^{2}|Y]$?

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#expected-value #conditional-probability #variance
385
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Standardized residuals

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#linear-algebra #statistics #regression #variance #standard-error
38
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How to show $P(X \ge E(X) + b) \le \frac{V(X)}{b^2+V(X)}$

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#probability #random-variables #expected-value #variance
19
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How to estimate conditional variance of the target variable y given the features X?

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#machine-learning #variance #parameter-estimation
1.1k
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Finding PMF of a zero-inflated Poisson random variable

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#probability #probability-distributions #expected-value #variance
258
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How to derive the mean and variance from a probability density function?

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#integration #probability-distributions #expected-value #variance #moment-generating-functions
99
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Working out Vector Variances using index notation

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#probability #vector-analysis #variance
318
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What is the average absolute deviation of a multivariate normal distribution?

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#normal-distribution #absolute-value #variance #average
224
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How to solve a system of equations Cov(X,Z) + Cov(Y,Z) + Cov(X,Y) = -Var(Z)/2?

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#statistics #random-variables #variance #covariance
192
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Calculate variance of polynomial expression (continuous correlated random variables)

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#probability #variance #covariance
389
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How to build a Cross-correlated Covariance matrix by solving an equation with Covariance and Variance expression of an unknown random variable?

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#statistics #random-variables #variance #covariance
37
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Variance of Poisson distributed variables $\leq1$

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#probability #statistics #poisson-distribution #variance
66
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Minimal value of $\mathbb{E}[(X-g(Y))^2]$.

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#random-variables #expected-value #variance
33
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How to find variance for given problem?

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#statistics #expected-value #variance
96
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Derivative and variance of random variable

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#probability-theory #expected-value #variance

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