Statistics Chapter 4: Discrete Random Variables
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5 Terms
1
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Random Variable
a variable that assumes numerical values associated with the random outcome of an experiment, where one (and only one) numerical value is assigned to each sample point
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Discrete Random Variable
a countable number of values
Ex: number of sales, number of calls, mistakes per page, people in line
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Continuous Random Variable
any value along a given interval of a number line
Ex: length, depth, volume, time, weight
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Probability Distributions for Discrete Random Variables
consists of all possible values of a random variable with their associated probabilities
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What are the 2 main conditions?
p(x) >= 0 (for all values of x)
Sum of all the probabilities must equal 1
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