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Describe the U.S.Social Security system and explain how it is funded.
Wilcoxon Test Statistic
A non-parametric test statistic used to compare two paired groups, assessing whether their population mean ranks differ.
Two-Tail
Refers to a type of hypothesis test that considers both directions of difference or effect, looking for deviations in two opposite directions.
Level Of Significance
The probability threshold below which a result is considered statistically significant.
Nonparametric Tests
Statistical tests that do not assume a specific distribution for the data, often used when parametric test assumptions cannot be satisfied.
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