241sn, ACilg MEDIAN 0 1 2s 20 1.56 1.66 1.93 1,52 0,34 0.79 . Figure 1. _t 10 20 L71 1,78 1.82 0.48 0.11 0.26 _ 1. 3 50 20 1.56 1.73 1,80 0.57 0.12 0.32 20 1.82 1.83 1.84 0.20 0.06 0.11 i 100 20 1.91 1.92 1.92 0.17 0.04 0.09 SIZE ALIQUOT (grams) N MEDIAN GEQMETRIC MEAN ARITHMETIC MEAN STANDARD DEVIATION STANDARD ERROR COEFFICIENT OF VARIATION 241 . : : Am Concentrations in Soil Aliquots of Different Sizes from Nuclear Site-201. toward high concentrations for all sizes, but the skewness decreases as aliquot size increases. The standard deviation decreases from 1.52 for the 1-g size to only 0.17 for 100-g aliquots. The coefficient of varia- tion (s/x) similarly decreases from 0.79 to 0.09. The arithmetic mean remains relatively constant over all aliquot sizes, but both the median and geometric mean tend to increase with increasing aliquot size. For both the 50- and to 100-g sizes, the median, arithmetic mean, and geometric mean are almost identical. 411