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.
Market Segmentation. Market segmentation is the process of identifying customer or potential customer subgroups that respond or are expected to respond differently to marketing variables including product, price, place (distribution) and promotion.