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Americans favor welfare payments to the poor, but only if they are truly in need and are not able bodied.
Probability Distribution
Describes how the probabilities are distributed over the values of a random variable.
Expected Value
The expected value of a variable, determined by summing up all possible values, each weighed by its probability of happening.
Sampling Distribution
The probability distribution of a given statistic based on a random sample, used to make inferences about the population.
Variance
A measure of the spread of numbers in a data set, indicating how far each number in the set is from the mean.
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