In each experiment, we divide the proportion is 2, the experiment is the experiment and the experiment of concrete curing and pull 3 sessions, and 4 in this proportion will have will have all 72. Example
Each portion of our study was divided into two experimental trials is compression and pulling trials and curing and three times in the four areas will have to sample all of the samples 72 samples.
In each experiment, a proportion, we 2 experiments and experimental tensile and compression curing concrete 3 time periods and in 4 this proportion will have all the examples, examples will be 72 For example.