The rolling totals method of computing sums,sums of squares,and sums of cross-products |
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Authors: | J Douglas Ayers J Perham Stanley |
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Institution: | (1) Defence Research Medical Laboratories, USA |
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Abstract: | The rolling totals method of computing sums, sums of squares, and sums of cross-products appears to have several advantages over usual methods, in that it saves time and requires less equipment. Only an IBM sorter and a tabulator equipped with Card Cycle Total Transfer Device are used. The method provides an immediate independent visual check on the accuracy of the sums of cross-products of each successive variable as it is run. Since controlling is done by sorting, the necessity for re-wiring after each run on the tabulator is eliminated. The wiring, illustrated by a diagram, is simple and straightforward.ABITIBI POWER AND PAPER COMPANY |
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