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Kenneth Arrow proved that the voting system that satisfied all of the properties of his "perfect" voting system was
Residual Plot
A graph that shows the residuals (the differences between observed and predicted values) on the vertical axis against the predicted values on the horizontal axis, used to evaluate the fit of a model.
Curvilinear Regression
A form of regression analysis in which the relationship between the independent variable and the dependent variable is modeled as an nth degree polynomial.
Specific Risk
A type of risk that affects a very small number of assets, such as a single stock or sector, also known as unsystematic or idiosyncratic risk.
Beta
In finance, it's a measure of the volatility, or systematic risk, of a security or a portfolio in comparison to the market as a whole. In statistics, it refers to the second type of error in a hypothesis test.
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