Element

wt%

Samp.

n

Min.

x_min

Max.

x_max

Average

x_a

Standard

dev. s

Variation

coeff. v

Mod

m_o

Median

m_e

Skewness

g

Excess

e

Cu

Pb

Zn

*Fe₃O₄

S

1369

55

330

353

904

0.20

0.50

0.50

20.00

20.00

16.60

4.20

13.11

92.55

48.69

2.23

1.08

2.60

42.91

33.10

2.33

0.57

2.14

14.88

6.59

104

32

82

35

20

0.75

0.74

1.04

35.00

36.80

1.29

0.97

1.98

40.08

33.69

+1.90

+3.20

+2.08

+0.56

−0.02

+ 4.53

+15.52

+4.96

−0.35

−0.71