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Data unit 4: probability distributions for discrete variables
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probability distribution
The probabilities for all possible outcomes of an experiment or sample space, often shown as a graph of probability vs. the value of a random variable
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random variable
a quantity that can have a range of values denoted by a capital letter X, with individual values designated by a lower-case x
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discrete
Random variable that has a countable number of possible outcomes that can be listed
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continuous
Random variable that has an uncountable number of possible outcomes
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probability histogram
A graph of probability distribution
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expectation
Predicted average of all possible outcomes
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uniform distribution
Occurs when, in a single trial, all outcomes are equally likely
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binomial distribution
A distribution with independent trials whose outcomes are either success or failure
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hypergeometric distribution
A distribution with dependent trials that are either success or failure
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