This report presents a method of statistical analysis for particle-size data obtained with the Battelle CI-S-8 impactor. The equations developed in this report give a simplified method for determining the least-squares fit for data represented by a log-normal distribution function. Mathematical equations include:(1) computation of the slope and intercept, (2) transformation substitutions, (3) general results, and (4) application to the Battelle impactor, A sample calculation is given in the appendix.
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