In any form of research, true random sampling is always difficult to achieve. Most researchers are bounded…

A probability sampling method is any method of sampling that utilizes some form of random selection. In order…

The control chart is a graph used to study how a process changes over time.…

Control charts have long been used in manufacturing, stock trading algorithms, and process improvement methodologies…

Scatter Diagram or correlation diagram is a tool to describe changes in a dependent variable…

Definition of Cause & Effect Diagram The cause & effect diagram is the brainchild of…

The Pareto chart is a quality improvement tool that is based upon the Pareto principle, the…

A histogram is a graphical tool used to visualize data that can be produced with…