24
P. Lazo et al.
Table 3.1 Descriptive statistic Analysis of 2010 AMS trace metal data (N = 47)
Statistical parameters
As
Cd
Hg
Cu
Pb
Zn
Mean a
0.48
0.15
0.21
6.32
3.12
14.8
Median a
0.22
0.11
0.14
6.02
2.32
14.3
St. Deviation
0.61
0.13
0.32
2.69
2.88
9.22
CV %
126
88
154
43
92
62
Kurtosis
5.9
24.0
36.0
4.4
25.0
2.3
Skewness
2.4
4.4
5.7
1.7
4.7
1.1
Minimum a
0.05
0.04
0.04
2.14
1.34
1.00
Maximum a
2.86
0.90
2.23
15.6
19.7
46.9
Statistical parameters Se
Sb
Au
Ag
Mo
Ni
Co
Cr
V
Mean a
0.16 0.12 0.0047 0.087 0.27 13.36 2.06 27.03 3.81
Median a
0.14 0.10 0.0014 0.084 0.25 6.59
1.22 11.07 3.32
St. Deviation
0.09 0.08 0.0087 0.028 0.12 21.18 1.83 43.36 1.93
CV %
55
66
185
32
45
159
89
160
51
Kurtosis
4.3
6.9
17.1
3.8
0.9
20.9
2.3
18.2
2.6
Skewness
1.9
2.5
3.8
1.5
1.1
4.2
1.7
3.8
1.3
Minimum a
0.05 0.05 0.0005 0.04
0.11 1.56
0.39 1.47
1.15
Maximum a
0.47 0.45 0.0510 0.19
0.63 131
7.47 262
10.9
Statistical parameters Ti
Zr
Hf
Ta
W
Li
Na
K
Rb
Mean a
280 9.01
0.248 0.059 0.102 1.52 98.5
3481
7.90
Median a
246 7.88
0.214 0.055 0.094 1.39 87.1
2869
7.98
St. Deviation
147 4.25
0.133 0.031 0.047 0.79 52.2
1698
2.58
CV %
52
47
53
52
46
52
53
49
33
Kurtosis
0.9 3.0
0.8
0.8
0.6
2.8
9.2
5.3
-0.5
Skewness
1.1 1.4
1.0
1.1
0.8
1.4
2.5
2.2
0.0
Minimum a
77
3.75
0.070 0.013 0.020 0.28 27.9
1831
2.69
Maximum a
703 25.10 0.670 0.139 0.238 4.27 338.1 10043 14.0
Statistical parameters Cs
Cl
Br
I
Ba
Mg
Ca
Sr
Sc
Mean a
0.31 245
5.21
1.59 20.6
2934 6883
21.4 0.99
Median a
0.26 183
4.70
1.52 19.7
2960 6555
21.1 0.74
St. Deviation
0.18 201
2.02
1.08 8.13
976
1636
5.54 0.73
CV %
57
82
39
68
40
33
24
26
74
Kurtosis
1.0
4.6
−0.6 22.6 −0.9 −0.5 1.9
0.3
2.7
Skewness
1.3
2.0
0.5
4.0
0.1
0.1
1.3
0.6
1.8
(continued)
P. Lazo et al.
Table 3.1 Descriptive statistic Analysis of 2010 AMS trace metal data (N = 47)
Statistical parameters
As
Cd
Hg
Cu
Pb
Zn
Mean a
0.48
0.15
0.21
6.32
3.12
14.8
Median a
0.22
0.11
0.14
6.02
2.32
14.3
St. Deviation
0.61
0.13
0.32
2.69
2.88
9.22
CV %
126
88
154
43
92
62
Kurtosis
5.9
24.0
36.0
4.4
25.0
2.3
Skewness
2.4
4.4
5.7
1.7
4.7
1.1
Minimum a
0.05
0.04
0.04
2.14
1.34
1.00
Maximum a
2.86
0.90
2.23
15.6
19.7
46.9
Statistical parameters Se
Sb
Au
Ag
Mo
Ni
Co
Cr
V
Mean a
0.16 0.12 0.0047 0.087 0.27 13.36 2.06 27.03 3.81
Median a
0.14 0.10 0.0014 0.084 0.25 6.59
1.22 11.07 3.32
St. Deviation
0.09 0.08 0.0087 0.028 0.12 21.18 1.83 43.36 1.93
CV %
55
66
185
32
45
159
89
160
51
Kurtosis
4.3
6.9
17.1
3.8
0.9
20.9
2.3
18.2
2.6
Skewness
1.9
2.5
3.8
1.5
1.1
4.2
1.7
3.8
1.3
Minimum a
0.05 0.05 0.0005 0.04
0.11 1.56
0.39 1.47
1.15
Maximum a
0.47 0.45 0.0510 0.19
0.63 131
7.47 262
10.9
Statistical parameters Ti
Zr
Hf
Ta
W
Li
Na
K
Rb
Mean a
280 9.01
0.248 0.059 0.102 1.52 98.5
3481
7.90
Median a
246 7.88
0.214 0.055 0.094 1.39 87.1
2869
7.98
St. Deviation
147 4.25
0.133 0.031 0.047 0.79 52.2
1698
2.58
CV %
52
47
53
52
46
52
53
49
33
Kurtosis
0.9 3.0
0.8
0.8
0.6
2.8
9.2
5.3
-0.5
Skewness
1.1 1.4
1.0
1.1
0.8
1.4
2.5
2.2
0.0
Minimum a
77
3.75
0.070 0.013 0.020 0.28 27.9
1831
2.69
Maximum a
703 25.10 0.670 0.139 0.238 4.27 338.1 10043 14.0
Statistical parameters Cs
Cl
Br
I
Ba
Mg
Ca
Sr
Sc
Mean a
0.31 245
5.21
1.59 20.6
2934 6883
21.4 0.99
Median a
0.26 183
4.70
1.52 19.7
2960 6555
21.1 0.74
St. Deviation
0.18 201
2.02
1.08 8.13
976
1636
5.54 0.73
CV %
57
82
39
68
40
33
24
26
74
Kurtosis
1.0
4.6
−0.6 22.6 −0.9 −0.5 1.9
0.3
2.7
Skewness
1.3
2.0
0.5
4.0
0.1
0.1
1.3
0.6
1.8
(continued)