Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...

Control chart- a time-ordered plot of sample statistics, used to distinguish between random and nonrandom variability Control limits- the dividing lines between random and nonrandom deviations from ...

The cumulative sum chart for controlling the mean of a manufacturing process having normally distributed quality with known variance is studied. The costs of repairing the process, of operating out-of ...