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In a recent issue of this journal, Edward E. Cureton 1 published a table of correction factors, k, which allow unbiased estimation of the standard deviation of a normal population using the sample standard deviation. Excerpts from the following table which I have recently calculated will appear in 2. The table was calculated using double precision arithmetic and the table of logarithms of the gamma function given in 3. The table is in a form preferred by many statisticians and is more complete than Cureton's. If n is the sample size, x2 = (X X)2, and you are given lx2 S n n-I (1)
Ben W. Bolch (Sat,) studied this question.