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 range of values uncertainty of the compressive strength.

Answer 1

$\sigma=(2.53\plusmn0.03)\ MPa$ (with a probability of 0.95).