title 'Mean and Range Charts for Diameters'; symbol v=dot c=salmon; proc shewhart data=wafers; xrchart diamtr*batch / cframe = bigb cinfill = ywh cconnect = salmon coutfill = yellow; run; This example ...

For this reason Nelson (1982) recommends against plotting the moving ranges. Nelson notes that the assumption of normality is more critical for an individual measurements chart than for an chart. You ...

For example, in a survey about the number ... make sense to group this data before making a frequency chart. Image caption, The answers range from 0 to 34. A sensible grouping would be to put ...