Stat-Ease provides prediction equations in terms of actual units and coded units. In the case of mixture designs, the options are actual, pseudo and real units. The coded equations are determined first, and the actual equations are derived from the coded.
“Convert Coded response surface model to Actual” on page 1
“Convert a quadratic L_Pseudo mixture model to Real” on page 1
“Convert a quadratic U_Pseudo mixture model to Real” on page 1