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 grey market is an unofficial one, but is not illegal. The term âgray marketâ also refers to the import and sale of goods by unauthorized dealers; in this instance as well, such activity is unofficial but not illegal. Next Up.