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 percent error of the third measurement (2.52 MPa) if the accepted value is 2.55 MPa.

Answer 1

The error is

$$\epsilon=\frac{2.55-2.52}{2.55}·100\%=1.2\%.$$