Excerpt from City School Expenditures: The Variability and Interrelation of the Principal ItemsIt is impossible to gain adequate insight into facts as com plex as those of school expenses and school achievements with out some use of technical statistical methods. If Mr. Strayer's report puzzles some readers by its tables of frequency, its con stant use of the median rather than the average as a measure of central tendency, its coefficients of correlation and their correo tions, it is of necessity. The facts could not otherwise be handled properly - in some cases not at all.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.