Complete the following steps to specify the responses and factors for a variability chart.
In Responses, enter one or more columns that contain measurement data.
In Factors (1-8, outermost
first), enter the columns that contain the levels for the factors. The first variable is the outermost on the scale and the last variable is the innermost.
In By variables, enter one or more variables to create a separate chart for each level of the
grouping variables. The columns that you enter can be numeric or text, and must
be the same length as the columns in Responses.
(Optional) When you enter multiple By variables, Minitab enables the Show all combinations checkbox. Select this option to create a separate chart for each combination
of groups created by the By variables. If you do not select this option, Minitab creates a plot for each group of
each By variable.
For example, the first By variable has 2 groups, Male and Female, and the
second By variable has 2 groups, Employed and Unemployed. If you select
Show all combinations, Minitab creates 4 separate plots for the combinations of Male/Employed,
Male/Unemployed, Female/Employed, and Female/Unemployed. If you do not select
Show all combinations, Minitab creates 4 separate plots for Male, Female, Employed, and
Unemployed.
