@ernest_nyakundi @merugirlKe Most contractors mistake variations to mean better margins, but it is 50-50, quoting concrete at half the price might mean your loses will double when the volume of concrete doubles. And it is not easy to vary the rates in most contracts.
What you said is true though.
@ignyharaz2 Partial replacement of "a fancy word for egg shells" with cement in structural concrete. Then the null hypothesis is always true.
Funny thing, same wozzap masters students 😂