Model #

Independent variable(s)

Predictive Model

R2 value

1.

Cd

$\widehat{As}$ = 1.07 Cd + 78.55

90%

2.

Co

$\widehat{As}$ = 1.07 Co + 46.59

95.2%

3.

Cr

$\widehat{As}$ = 0.97 Cr + 68.82

92.2%

4.

Fe

$\widehat{As}$ = 0.04 Fe + 47.04

38.8%

5.

Pb

$\widehat{As}$ = 0.52 Pb + 24.05

38.6%

6.

Sb

$\widehat{As}$ = 0.66 Sb − 53.07

64.1%

7.

Tl

$\widehat{As}$ = 1.05 Tl + 57.29

90.8%

8.

Cd, Co, Cr, & Fe

$\widehat{As}$ = 0.77 Cd + 0.80 Co − 0.55 Cr + 0.01 Fe + 38.00

96.4%