Chapter 4 (stats) discrete random variables

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8 Terms

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Bernoulli Random Variable (Trials)

a discrete random variable that has only two possible values 1 (success) or 0 (failure).

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Binomial Random Variable

a discrete random variable that is the number of successes in n independent and identical Bernoulli trials. Its possible values are 0,1,2,…n.

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Geometric Random Variable

a discrete random variable that is the number of Bernoulli trials needed until the first success. Its possible values are 1,2,….

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Hypergeometric Random Variable:

a discrete random variable that is the number of successes in k trials. Its possible values 0,1,2,…k.

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Poisson Random Variable

a discrete random variable that counts the number of times a certain event will occur in a specific interval. Its possible values 0,1,2,….

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Probability Distribution Function (PDF)

a mathematical description of a discrete random variable.

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Cumulative Probability Distribution Function (CDF):

another mathematical description of a discrete random variable.

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Random Variable (RV):

a characteristic of interest in a population being studied.