Abstract
An argument was presented for the wider use of simple and standard statistical methods in the design and evaluation of laboratory and clinical [human cancer radiotherapy] experiments with toxic radiosensitizers. An argument was presented against the frequent practice of superposing a curve estimated from laboratory observations upon scattergrams of clinical observations to thereby assist the reader to the (often fallacious) inference that the 2 disparate sets of observations have enough in common to be graduated by the same curve. Such a practice achieves a substitution of reasoning by analogy for the more reliable statistical procedures of estimation and of testing a hypothesis.