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.
bull market. A bull market is a situation on the stock market when people are buying a lot of shares because they expect that the shares will increase in value and that they will be able to make a profit by selling them again after a short time. Compare bear market.