Refer to the Question"EXPERIMENTAL DATA,HOW TO COMPARE MEANS AND CHECK FOR MEDIATION?"Courtesy,Jonas.
and an answer " Recommending the use of...First Principles and Its derivatives" of Dec 20,2021.
"GIVEN that the variables of the group are e,x y,z and the assumptions of one part of the hypothesis... the Primay Means of the first group= exyzgp1÷4 per the conception of Primary Means could be calculated thus;
Primary Mean of the first Group={e+x+y}÷3 cube×zgp1÷4 .
Thus the Unit of the primary Mean is a cube(Volumetric).