Use a matrix plot to assess the relationships among several pairs of variables at once. If you enter more than 20 columns, Minitab software will not provide a matrix plot.
Statistics to display on
Minitab output displays the correlation coefficients and confidence intervals on the matrix plot by default. You can add p-values instead of confidence intervals, or you can remove all statistics from the plot.
Matrix plot display
Minitab output displays the matrix plot in the lower left triangle by default. You can specify the upper right triangle, or the full matrix plot.