Table 10: Standard deviation and coefficient of variation of cubes and cylinders compressive strength

7 days Sd 7 days CV 28 days Sd 28 days CV
5.631 0.230 4.636 0.140
5.556 0.262 4.992 0.156
5.850 0.290 5.075 0.169
7.007 0.374 4.672 0.169
7.118 0.428 5.765 0.219