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Chance variation, chance error.
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A random variable can be decomposed into a sum of its expected value and chance variation around its expected value. the expected value of the chance variation is zero; the standard error of the chance variation is the same as the standard error of the ra
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Decomposed, английский
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Binomial distribution., английский
A random variable has a binomial distribution (with parameters n and p) if it is the number of "successes" in a fixed number n of independent random trials, all of which have the same probability p of resulting in "success." under thes
Random sample., английский
A random sample is a sample whose members are chosen at random from a given population in such a way that the chance of obtaining any particular sample can be computed. the number of units in the sample is called the sample size, often denoted n. the numb
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