Abstract

Abstract Short-cut techniques involving centroids of sets of points are extended to least squares applications in line fitting and to determining the mean of a frequency distribution. * Revision of part of the paper presented at the Annual Meeting of the Institute of Mathematical Statistics, Atlantic City, N. J., Sept. 13, 1957. This work was carried out at the Department of Therapeutic Research, School of Medicine, University of Pennsylvania, Philadelphia, supported in part by Grant H-625 (C-7) from the National Heart Institute of the National Institutes of Health, and at the Ophthalmology Research Laboratory, Albert Einstein Medical Center, Northern Division, Philadelphia, under a research grant from the Weinstock Fund.

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