Mean or Expected Value and Standard Deviation

Correct answer: 108.2 Explanation: The z-score equation is given as: z = (X - μ) / σ, where X is the value of the element, μ is the mean of the population, and σ is the standard deviation. To solve


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Standard Deviation of Discrete Random Variables

Discrete random variable can take infinite (countable) amount of values, in that case sum will be from 1 to infinity, and the point is to find the sum of the infinite row Standard

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How to Find the Standard Deviation of a Probability Distribution

Variance & Standard Deviation of a Discrete Random Variable. For a given random variable X, with associated sample space S, expected value μ, and probability mass function P ( x), we define

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