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Show that variance function is non-negative over all arguments

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#algebra-precalculus #variance
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Variance definition (basics)

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#probability #variance #expected-value
772
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Expectation and variance of number of movie tickets

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#probability-theory #conditional-expectation #poisson-distribution #variance
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On the variance in the Bernoulli scheme

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#probability #probability-theory #probability-distributions #variance
342
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Expected value and variance of a transformed random variable

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#statistics #random-variables #variance #expected-value
176
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Is $E[g(x_i)g(x_j)]=E[g(x_i)]\,E[g(x_j)]$, for $x_i$ multinomial?

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#probability #variance #multinomial-coefficients
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Why does $ \operatorname{Var}(X) = E[X^2] - (E[X])^2 $

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#probability #statistics #variance
323
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Conditional mean and variance of $X$ given that $Y=6$ for $X$ normal $N(0,1)$ and $Y$ conditionally on $X=x$ normal $N(x,1)$

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#probability-theory #probability-distributions #conditional-expectation #variance #expected-value
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Calculating the variance of a random variable

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#probability #random-variables #variance
1k
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what premium should the company charge each policy holder to assure that the premium income will cover the cost of the claims?

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#probability #variance #standard-deviation
65
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Expectation and variance of travel time with several options for the transportation

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#probability-theory #random-variables #variance #expected-value
350
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Find the expected value and standard deviation of the returns for the following portfolio

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#probability #variance #standard-deviation #bivariate-distributions
128
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Bivariate normal: Expected value and variance

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#calculus #variance #expected-value #bivariate-distributions
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Covariance and Law of Large numbers

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#probability #covariance #variance #law-of-large-numbers
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Expected number of good presents

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#probability #random-variables #variance #expected-value

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