Table 2: Independent sample T-test for difference in concentration of well water parameters between dry and rainy seasons.

PARAMETER PAIR MEAN±SE N SD df TCalc Sig(2-tailed) RMKS
Temperature (oC) Dry season
Rainy season		 29.1±0.32
25.4±0.30		 15
15		 1.23
1.15		 14
14		 8.294 0.000 S
pH Dry season
Rainy season		 6.8±0.13
6.9±0.15		 15
15		 0.51
0.59		 14
14		 -0.89 0.381 NS
Turbidity (NTU) Dry season
Rainy season		 111.5±45.94
120.9±45.79		 15
15		 177.91
177.35		 14
14		 -0.146 0.885 NS
EC (µs/cm) Dry season
Rainy season		 822.31±35.65
792.20±55.22		 15
15		 138.06
213.89		 14
14		 0.458 0.650 NS
TDS (mg/l) Dry season
Rainy season		 474.6±18.50
444.9±30.50		 15
15		 71.65
118.13		 14
14		 0.833 0.412 NS
Total coliform(x104 cfu/ml) Dry season
Rainy season		 5.8±0.79
6.9±0.69		 15
15		 3.05
2.67		 14
14		 -1.115 0.274 NS
Faecal coliform(x104 cfu/ml) Dry season
Rainy season		 5.1±0.148
7.9±0.59		 15
15		 1.87
2.28		 14
14		 -3.769 0.001 S
Aluminium (mg/l) Dry season
Rainy season		 0.102±0.013
0.153±0.027		 15
15		 0.05
0.11		 14
14		 -1.709 0.099 NS
Cadmium (mg/l) Dry season
Rainy season		 0.001±0.003
0.014±0.005		 15
15		 0.12
0.02		 14
14		 -0.616 0.543 NS
Lead (mg/l) Dry season
Rainy season		 0.016±0.003
0.016±0.005		 15
15		 0.11
0.02		 14
14		 0.055 0.956 NS
Chromium (mg/l) Dry season
Rainy season		 0.021±0.005
0.029±0.006		 15
15		 0.02
0.02		 14
14		 -1.045 0.305 NS

N=Number of Samples SD=Standard Deviation df=Degree of freedom t calc=Calculated t-value Sig (2-tailed)=Significance of 2 tailed test, RMKS=Remarks
EC=Electrical Conductivity, TDS=Total Dissolved Solids, Total coliform=Total coliform count, Faecal coliform=Faecal coliform count, S=Significant, NS=Not Significant