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TABLE 9 <br /> REGRESSION PARAMETERS FOR COMPARABILITY' <br /> Arsenic Barium Copper <br /> n Int. Slope n Int. Slope n rz Int. Slope <br /> II Data 824 0.94 1.62 0.94 1255 0.71 60.3 0.54 984 0.93 2.19 0.93 <br /> Soil 368 0.96 1.41 0.95 393 0.05 42.6 0.11 385 0.94 1.26 0.99 <br /> Soil 453 0.94 1.51 0.96 462 0.56 30.2 0.66 463 0.92 2.09 0.95 <br /> Soil - - - - 400 0.85 44.7 0.59 136 0.46 16.60 0.57 <br /> Prep 1 207 0.87 2.69 0.85 312 0.64 53.7 0.55 256 0.87 3.89 0.87 <br /> Prep 2 208 0.97 1.38 0.95 315 0.67 64.6 0.52 246 0.96 2.04 0.93 <br /> Prep 3 204 0.96 1.20 0.99 315 0.78 64.6 0.53 236 0.97 1.45 0.99 <br /> Pre 4 205 0.96 1.45 0.98 313 0.81 58.9 0.55 246 0.96 1.99 0.96 <br /> Lead Zinc Chromium <br /> n r2 Int. Slope n rZ Int. Slope n rz Int. Slope <br /> II Data 1205 0.92 1.66 0.95 1103 0.89 1.86 0.95 280 0.70 64.6 0.42 <br /> Soil 357 0.94 1.41 0.96 329 0.93 1.78 0.93 - - - - <br /> Soil 2 451 0.93 1.62 0.97 423 0.85 2.57 0.90 - - - - <br /> oil 3 397 0.90 2.40 0.90 351 0.90 1.70 0.98 186 0.66 38.9 0.50 <br /> Prep 1 305 0.80 2.88 0.86 286 0.79 3.16 0.87 105 0.80 66.1 0.43 <br /> Prep 2 298 0.97 1.41 0.96 272 0.95 1.86 0.93 77 0.51 81.3 0.36 <br /> Prep 3 302 0.98 1.26 0.99 274 0.93 1.32 1.00 49 0.73 53.7 0.45 <br /> Prep 4 300 0.96 1.38 1.00 271 0.94 1.41 1.01 49 0.75 31.6 1 0.56 <br /> Source: Reference 4 <br /> ' Log-transformed data <br /> n Number of data points <br /> rZ Coefficient of determination <br /> Int. Y-intercept <br /> No applicable data <br /> CD-ROM 6200 - 30 Revision 0 <br /> January 1998 <br />