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Find E[X] and V[X]

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#probability #probability-theory #probability-distributions #variance
105
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Let $X,Y$ be independent RVs. If there exists $c \in \mathbb R $ s.t. $P(X+Y=c)=1$, then $X,Y$ are constants

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#probability #probability-theory #random-variables #independence #variance
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Stratified Sampling for Variance Reduction--Need Intuition as to Why it Works

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#variance #sampling #monte-carlo
48
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Variance of the real part of a complex random variables

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#probability #expectation #variance
34
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Are ALL values between the average value +- the variance?

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#stochastic-processes #normal-distribution #random #standard-deviation #variance
57
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How to compute basic statistics of the time series $Y_j = A \sin(\theta \times j) + Z_j$

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#statistics #stochastic-processes #expectation #variance #time-series
270
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If we have infinite variance, can the expectation 'mean' anything?

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#probability #expectation #variance
45
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The setup for computing the conditional (co)variance

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#probability #probability-distributions #conditional-expectation #covariance #variance
390
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Variance without referring to mean

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#variance #means
264
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Is the series $X_j = Z_0 \cos(c j)$ stationary?

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#expectation #covariance #variance #time-series #stationary-processes
51
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Influence of variance change in variable $x_2$ on the variance of its OLS estimator

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#statistics #regression #variance #regression-analysis
546
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manipulating two numbers that both have + and - sign in front

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#probability #probability-distributions #normal-distribution #variance
289
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why add variance but not standard deviation

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#probability #probability-distributions #standard-deviation #variance
143
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Survival function and existence of moments given parameter range

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#probability #variance
227
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Expectation/Variance of piecewise function of random variables

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#random-variables #expectation #variance #piecewise-continuity

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