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.
Lift. Lift is created as air flows over both surfaces of the kite. The air must flow over an area that has a shape like a wing. When this happens, the air flowing over the top of the wing flows faster than the air along the bottom â this creates a pressure difference.