The following table gives a number of yield strength values (in MPa) that were measured on the

Question:

The following table gives a number of yield strength values (in MPa) that were measured on the same aluminum alloy. Compute average and standard deviation yield strength values?
274.3 ................... 277.1 ................... 263.8
267.5 ................... 258.6 ................... 271.2
255.4 ................... 266.9 ................... 257.6
270.8 ................... 260.1 ................... 264.3
261.7 ................... 279.4 ................... 260.5