I. When the sum of the residuals is greater than zero, the data set is nonlinear. II. A random pattern of residuals supports a linear model. III. A random pattern of residuals supports a non-linear model.
bull market definition. A market, especially a stock market, characterized by rising prices; the opposite of a bear market. We can always go back to worrying; we are still in a bull market for fear.
The Wall Street bull is a statue that symbolizes Wall Street. A bull market is when stock prices rise, and is considered more profitable than a bear market, although savvy Wall Street traders can make money in any market. The Wall Street bull has been moved off of Wall Street to 26 Broadway.