Statistic
EC
TDS
TH
Cl−
Na+
Ca2+
Mg2+
K+
CWQI-OBS
No. of observations
28
28
28
28
28
28
28
28
28
28
28
Minimum
1004.0
634.0
226.0
147.2
194.9
50.3
73.2
54.3
20.2
2.6
31.2
Maximum
1626.0
1023.0
464.0
389.5
385.2
85.3
216.0
108.9
46.0
6.0
73.5
Range
622.0
389.0
238.0
242.4
190.3
35.0
142.8
54.6
25.8
3.4
42.3
1st Quartile
1123.0
695.3
247.3
204.5
228.0
62.2
148.1
59.9
25.7
3.5
39.5
Median
1238.0
781.5
273.0
234.6
261.8
65.6
166.4
65.6
31.4
3.9
48.5
3rd Quartile
1388.5
861.5
319.8
276.5
305.9
69.7
190.5
71.4
37.0
4.3
64.9
Mean
1253.5
787.3
290.4
242.7
267.4
66.4
165.1
67.3
32.1
4.0
51.6
Variance (n)
29074.6
12346.4
2864.1
3630.4
2434.5
48.9
1008.8
120.0
48.4
0.5
175.0
Standard deviation (n)
170.5
111.1
53.5
60.3
49.3
7.0
31.8
11.0
7.0
0.7
13.2
Skewness (Pearson)
0.4
0.4
1.3
0.6
0.6
0.4
−0.7
1.9
0.3
0.7
0.3
Kurtosis (Pearson)
−0.8
−0.8
1.8
−0.2
−0.5
0.8
0.5
5.0
−0.8
0.5
−1.2
Standard error of the mean
32.8
21.4
10.3
11.6
9.5
1.3
6.1
2.1
1.3
0.1
2.5