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Sum of normally distributed random variables information


In probability theory, calculation of the sum of normally distributed random variables is an instance of the arithmetic of random variables.

This is not to be confused with the sum of normal distributions which forms a mixture distribution.

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Sum of normally distributed random variables

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of the sum of normally distributed random variables is an instance of the arithmetic of random variables. This is not to be confused with the sum of normal...

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Algebra of random variables

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sophisticated ideas of probability theory. Its symbolism allows the treatment of sums, products, ratios and general functions of random variables, as well as...

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Normal distribution

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Sub-Gaussian distribution Sum of normally distributed random variables Tweedie distribution – The normal distribution is a member of the family of Tweedie exponential...

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Multivariate normal distribution

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counterexamples for more than two random variables. In general, they sum to a mixture model.[citation needed] In general, random variables may be uncorrelated but...

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Outline of probability

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Cantor Fisher–Tippett (or Gumbel) Pareto Benford's law Sum of normally distributed random variables Borel's paradox (Related topics: integral transforms)...

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Random variable

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f(X)=X} of the random variable. However, even for non-real-valued random variables, moments can be taken of real-valued functions of those variables. For...

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Binomial distribution

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A Binomial distributed random variable X ~ B(n, p) can be considered as the sum of n Bernoulli distributed random variables. So the sum of two Binomial...

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Probability distribution

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distribution of a sum of squared standard normal variables; useful e.g. for inference regarding the sample variance of normally distributed samples (see...

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Relationships among probability distributions

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special case of another with a broader parameter space Transforms (function of a random variable); Combinations (function of several variables); Approximation...

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Variance

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for example, the variance of a sum of uncorrelated random variables is equal to the sum of their variances. A disadvantage of the variance for practical...

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List of convolutions of probability distributions

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theory, the probability distribution of the sum of two or more independent random variables is the convolution of their individual distributions. The term...

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Covariance

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probability theory and statistics is a measure of the joint variability of two random variables. The sign of the covariance, therefore, shows the tendency...

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Distribution of the product of two random variables

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type of algebra for random variables: Related to the product distribution are the ratio distribution, sum distribution (see List of convolutions of probability...

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Central limit theorem

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random variables. A sum of discrete random variables is still a discrete random variable, so that we are confronted with a sequence of discrete random variables...

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Rademacher distribution

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where a random variate X has a 50% chance of being +1 and a 50% chance of being -1. A series (that is, a sum) of Rademacher distributed variables can be...

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Cauchy distribution

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distributed angle. It is also the distribution of the ratio of two independent normally distributed random variables with mean zero. The Cauchy distribution...

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Ordinary least squares

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needed] effects of a linear function of a set of explanatory variables) by the principle of least squares: minimizing the sum of the squares of the differences...

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Law of large numbers

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average will be normally distributed (as the average of a set of normally distributed variables). The variance of the sum is equal to the sum of the variances...

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Correlation

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causal or not, between two random variables or bivariate data. Although in the broadest sense, "correlation" may indicate any type of association, in statistics...

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White noise

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(in other words independent and identically distributed random variables are the simplest representation of white noise). In particular, if each sample...

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Mutual information

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information (MI) of two random variables is a measure of the mutual dependence between the two variables. More specifically, it quantifies the "amount of information"...

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Logistic regression

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identically distributed trials, where the observation Yi is the number of successes observed (the sum of the individual Bernoulli-distributed random variables),...

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Conditional expectation

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conditional mean of a random variable is its expected value evaluated with respect to the conditional probability distribution. If the random variable can take...

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Simple linear regression

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of the slope coefficient will itself be normally distributed with mean β and variance σ 2 / ∑ ( x i − x ¯ ) 2 , {\displaystyle \sigma ^{2}\left/\sum (x_{i}-{\bar...

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Rayleigh distribution

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distribution for nonnegative-valued random variables. Up to rescaling, it coincides with the chi distribution with two degrees of freedom. The distribution is...

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Multinomial logistic regression

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probabilities of the different possible outcomes of a categorically distributed dependent variable, given a set of independent variables (which may be...

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