Sorting by the second CONTROL variable continues to alternate between ascending and descending sorting throughout all levels of the first CONTROL variable. If there is a third CONTROL variable, the ...

These are control variables. Values and readings. The values are the measurements used for the independent variable. If, for example, one of the variables in an experiment was length, ...

These are control variables. Values and readings. The values are the measurements used for the independent variable. If, for example, one of the variables in an experiment was length, ...