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Variance of sum of $k$ randomly drawn numbers from $1,...,n$.

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#probability #random-variables #expected-value #variance
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How is it correct to use the linearity of expected value?

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#expected-value
326
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What is the mean value of $(X_1^2+X_2^2+\cdots X_N^2)/(X_1+X_2 + \cdots +X_N)$

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#probability #probability-distributions #expected-value
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Expected value of Squared Error

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#random-variables #expected-value #machine-learning #regression
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Inequality of expectation

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#probability-theory #expected-value
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Can we find $E(XY)$ if given $E(X), E(Y), E(X^2), E(Y^2)$?

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#probability #expected-value
600
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Expected Value of Poisson Process

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#probability #probability-distributions #expected-value #poisson-process
96
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Is it right to say that vectors $A_1 X$ and $A_2 X$ are independent iff $A_1A_2^\top=0$?

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#probability #statistics #expected-value #covariance
57
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Product of Functions of Random Variable

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#probability #multivariable-calculus #functions #expected-value
33
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How to integrate over a random variable to get the expectancy value

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#stochastic-integrals #expected-value
65
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Predicting the number of nested circles

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#probability #geometry #random-variables #expected-value
62
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One Problem Regarding Expectation

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#probability #probability-theory #probability-distributions #expected-value
78
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One question regarding Basic Probability theory

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#probability #probability-theory #expected-value
111
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Proof of expected time to failure for a "k out of n" system, each component IID exponentially distributed

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#statistics #expected-value #order-statistics #reliability
392
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How much are you willing to pay for this treasure chest game?

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#probability #conditional-expectation #expected-value

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