Question

Data on the compressive strength of a concrete block after testing are as follows: 2.50 MPa, 2.55 MPa, 2.52 MPa, 2.51 MPa, and 2.56 MPa. Find the average compressive strength.

Answer 1

The average compressive strength is

$$\sigma_\text{avg}=\frac{2.50+2.55+2.52+2.51+2.56}{5}=2.53\text{ MPa}.$$