Question: In the study of problem, the purpose was to evaluate the effect of firing on pellet density. Each of the pellets fired had different original densities (that were not recorded). Does the measurement protocol described in problem 2 provide data that track what is of primary interest, i.e., does it produce a valid measure of firing effect? What additional data should have been collected? Why?
Problem: Pellet Densification. Crocfer, Downey, Rixner, and Thomas studied the densification of Nd2O3. Pellets of this material were fired at 1,400 ?C for various lengths of time and the resulting densities measured (in g/cc). In this context, what are the measurand (x), y, , and δ?