Statistical Approaches in

Statistical Approaches in Machinery Problem Solving Table 62.2 Primary machinery component failure... 

These data show how the method was applied in a case where standard and unknown were presumably identical in composition, and they emphasize the necessity for a statistical approach in all w ork of this kind. 

Called Z-star by P. and T. Ehrenfest, in Encyklopadie der mathematischen Wissenschaf-ten, Band 4, Nr. 32 (Teubner, Leipzig 1912) translated by M.J. Moravcsik under the title Conceptual Foundations of the Statistical Approach in Mechanics (Cornell University Press, Ithaca 1959). 

The term parametric test, or analysis, is introduced in Section 6.2.4. In broad terms, statistical analyses can be placed into one of two categories, parametric tests and nonparametric tests. This book almost exclusively discusses parametric tests, but it should be noted here that nonparametric tests are also very valuable analyses in appropriate circumstances. As with the terms experimental design and nonexperimental design (recall Section 5.5), the term nonparametric is not a relative quality judgment compared with parametric. This nomenclature simply differentiates statistical approaches. In circumstances where nonparametric analyses are appropriate, they are powerful tests. 

Ehrenfest, P., Ehrenfest T. "The conceptual foundations of statistical approach in mechanics", The Cornell University Press, Ithaca, NY (1959). 

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