Mean and standard deviation of concrete cube Statistical quality control of concrete Materials, mixing, placing and curing affects the compressive strength of concrete. The better understanding of properties leads to production of good quality of concrete. By using mean, standard deviation and coefficient of variation gives good picture of variation of quality of concrete. This page helps in design of concrete by trial mix. The trial mix data is fed into table to calculate above mentioned statistical quantities. Edit the 20 compression strength data by clicking on data.if data is not present type zero in compressive strength column. Specimen No. Compressive strength MPa. Deviation Square of deviation 1. 43 ...