Statistic
EC
TDS
TH
Cl−
Na+
Ca2+
Mg2+
K+
CWQI-OBS
No. of observations
8
8
8
8
8
8
8
8
8
8
8
Minimum
1797.0
1134.0
357.0
276.7
428.9
60.3
224.2
63.0
39.5
3.8
27.7
Maximum
2176.0
1356.0
453.0
458.7
517.1
126.3
317.9
89.5
67.5
10.6
35.9
Range
379.0
222.0
96.0
182.0
88.2
66.0
93.7
26.5
28.1
6.7
8.2
1st Quartile
1936.5
1225.0
381.0
353.5
448.2
75.2
275.4
74.0
45.0
6.5
28.2
Median
2035.5
1274.5
399.0
392.5
463.0
89.5
279.1
85.0
52.5
8.2
29.1
3rd Quartile
2108.8
1338.5
423.0
421.9
489.9
97.9
288.4
87.3
54.2
9.0
34.5
Mean
2010.4
1266.4
404.0
381.3
468.1
89.4
278.8
80.6
51.0
7.6
30.9
Variance (n)
16243.7
5951.2
1025.0
3242.6
834.2
392.1
607.6
76.4
73.5
5.6
10.8
Standard deviation (n)
127.5
77.1
32.0
56.9
28.9
19.8
24.7
8.7
8.6
2.4
3.3
Skewness (Pearson)
−0.5
−0.5
0.2
−0.5
0.3
0.4
−0.8
−0.9
0.3
−0.5
0.5
Kurtosis (Pearson)
−1.1
−1.1
−1.2
−0.9
−1.1
−0.7
0.8
−0.6
−0.5
−1.0
−1.6
Standard error of the mean
48.2
29.2
12.1
21.5
10.9
7.5
9.3
3.3
3.2
0.9
1.2