What event marked the beginning of the US Civil War? The main cause of the Civil War has been debated for years. The first military action was Confederate forces attacking Union Fort Sumter.
1 Lift Charts. 2  The lift curve is a popular technique in direct marketing. 3  The input required to construct a lift curve is a validation dataset that has been scored by appending to each case the estimated probability that it will belong to a given class.
Slope (ramp, inclined plane) problems are usually solved by rotating our frame of reference. In most problems we are dealing with a horizontal surface. Our normal frame of reference specifies vertical and horizontal directions using up or down, right or left for example. Consider a toboggan pulled along a virtually frictionless icy surface, by a rope at an angle upward.