X-bar and R charts are a pair of control charts that are used together to analyze the variation of a continuous variable. X-bar stands for the mean or average of a sample, and R stands for the ...

There are three measures of central tendency for data. One is the mean or x-bar, and the others are the median and mode. When ...

There are X-MR charts, Xbar-R charts, and Xbar-S charts available as well. If you call the control_chart() function, the appropriate sample size will be selected and data grouped as the dataset ...