Abstract
IN statistical work, one of the commonest arithmetical operations is finding the sum of squares of deviations of a set of numbers from their mean, zero, or some other fixed point, often followed by extraction of the square root of the result. When a machine is not available, the calculations are very tedious and liable to error. I have, therefore, tried out a simple geometrical method, illustrated in .
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WOOLF, B. Rapid Calculation of Standard Deviations. Nature 164, 360–361 (1949). https://doi.org/10.1038/164360b0
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DOI: https://doi.org/10.1038/164360b0
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