The data set SHIRTS contains three variables: the box number (BOX), the average number of flaws per shirt (AVGDEFU), and the number of shirts per box (AVGDEFN). Here, a subgroup is a box of shirts, ...

run; The SUBGROUPN= option names the variable in the DATA= data set whose values specify the number of inspection units per subgroup. The OUTHISTORY= option names an output data set containing the ...