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.
A bull market is a financial market of a group of securities in which prices are rising or are expected to rise. The term bull market is most often used to refer to the stock market but can be applied to anything that is traded, such as bonds, currencies and commodities. For more details, here is a link to the whol article. Bull Market. Here is.