Elements of Statistical Reasoning

"Every set of factual data in science that may be assembled for statistical analysis presents questions which are intimately concerned with the validity of the data themselves. Misinterpretation all too readily flows from routine application of statistical procedures.... That which comprises good health at one age may quite properly be regarded as poor health at another age. It is virtually impossible to reach general concordance of judgment in subdividing variation in the state of health into even very few subgroups.... The accuracy of mathematical deductions from data must inevitably be limited in some way by the precision and adequacy of the observations themselves. Emphasis must always be laid, therefore, on the necessity for the exercise of critical judgment in the collection and recording of data. Precision in measurement and care in classification materially enhance the value of observations."

In statements such as these does the author of this addition to