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<br /> 21.02 <br /> Table 4,l. Linear regression analysis of chemical cons ti tuents versus electrical conductivity <br /> from four observation sites on Coal Creek. <br /> Constants in Eq. 4.1 <br /> a b Degrees Level <br /> (mg/l/ 2 of of <br /> Comparison (mg/1) \l1Ilhos/cm) r t Freedom Significance <br /> Upper Site <br /> TDS VS. Conductivity 36.03 0.582 .489 6.105 41 ** <br /> SO~ vs. Conductivity -38.23 0.230 .650 8.502 41 ** <br /> Cl- VS. Conductivity 10.23 0.003 .016 .812 41 NS <br /> Ca+t VS. Conductivity ~71.00 0.157 .337 4.457 41 ** <br /> Mg+ vs. Conductivity -1.92 0.035 .196 3.080 41 ** <br /> Na+ VS. Conductivity 4.41 0.089 .432 5.587 41 ** <br /> Spring <br /> TDS vs. Conductivity 3300.65 -0.425 .074 -I. 203 18 NS <br /> SOl; VS. Conductivity 260.16 0.340 .019 .635 21 NS <br /> Cl- VS. Conductivity 86.77 -0.028 .057 -1.103 20 NS <br /> Ca+t VS. Conductivity 99.27 0.030 .002 .173 19 NS <br /> Mg+ VS. Conductivity -48.34 0.044 .017 .576 19 NS <br /> Na+ VS. Conductivity 1213.82 -0.305 .080 -1.286 19 NS <br /> Middle Site <br />w TDS Conductivity -311.93 0.857 .864 I!. 310 20 ** <br />0 VS. <br /> SO~ VS. Conductivity -558.95 0.630 .883 12.299 20 ** <br /> Cl- vs. Conductivity 27.27 -0.002 .OU -.474 21 NS <br /> Ca+t VS. Conductivity -121.56 0.U9 .174 2.054 20 NS <br /> Mg+ vs. Conductivity 6.18 0.024 .173 2.044 20 NS <br /> Na+ vs. Conductivity -19.72 0.130 .347 3.338 21 ** <br /> Total Hardness(Y) VS. eoudnc- -108.89 0.312 .609 5.725 21 ** <br /> tivity (X) <br /> Lower Site <br /> TDS VS. Conductivity -218.07 0.843 .954 24.98 30 ** <br /> SOl; VS. Conductivity -298.24 0.548 .941 21.43 29 ** <br /> Cl- VS. Conductivity -2.67 0.016 .838 12.66 31 ** <br /> Ca+t VS. Conductivity 2.72 0.035 .201 2.789 31 ** <br /> Mg+ VS. Conductivity -9.85 0.030 .518 5.771 31 ** <br /> Na+ VS. Conductivity -65.U 0.156 .554 6.205 31 ** <br /> Total Hardness (Y) VS. Conduc- 35.97 0.285 .479 5.333 31 ** <br /> tivi ty (X) <br /> Null Hypothesis H : B = 0 <br /> 0 <br /> NS - No significant difference at tbe 0.95 level. <br /> * - Significantly different at the 0.95 level. <br /> ** - Significantly different at the 0.99 level. <br />