Each observation contains the diameter measurement and identification number for a particular engine. The variable ENGINE identifies the sequence of engines and is referred to as the subgroup-variable ...

Montgomery (1996) points out that a moving range chart should be interpreted with care because "the moving ranges are correlated, and this correlation may often induce a pattern or runs or cycles on ...

In the last 15 years, the average bust size has increased from 34B to 36C. Whether the lift is due to breast augmentation surgeries or a side-effect of expanding waistlines is not known. Either way, ...