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.
flea market. A market, usually held outdoors, where used goods and antiques are sold. For example, We picked up half of our furniture at flea markets. The term is a direct translation of the French marchÃ© aux puces and presumably implies that some of the used clothes and furniture might be flea-infested.