To assess how the mean of Aflatoxin PPB varies by Corn Yield, you can pivot the Descriptives table to display the statistics that you want.

step In the output window, double-click the Descriptives table to activate it.

step From the Viewer menus choose:

Pivot
 Pivoting Trays...

step Select the Statistics icon (the third element) in the Row tray.

step Drag the Statistics icon to the Layer tray.

step Close the Pivoting Trays window.

step Deactivate the table by clicking outside of its boundaries.

According to U.S. law, a yield is unfit for human consumption if aflatoxin exceeds 20 PPB. The pivoted table makes it clear that in these data, only yields 4, 7, and 8 fall below the 20 PPB cutoff.