ESTIMATION OF SIGMA USING AVERAGE RANGE FROM K RANGES OF VARYING SIZES.

摘要

An efficient way was determined to estimate the population standard deviation using k ranges of varying sizes. Standard deviation has been estimated using k ranges of equal size,but the investigator has yet to see the development for the above case. The investigation relies on estimation of standard deviation,using the overall range and the biasness encountered therein. These results may be used to estimate standard deviation when one has subgroups of different sizes belonging to a sample of size N. (Author)