Table 4: Paired sample T-test for difference in concentration of water parameters between streams and wells in dry season.

PARAMETER PAIR MEAN±SE N SD df TCalc Sig(2-tailed) RMKS
Temperature (oC) Well water
Stream water		 29.1±0.32
29.5±0.36		 15
15		 1.23
1.39		 14
14		 -1.049 0.312 NS
pH Well water
Stream water		 6.8±0.13
7.6±0.18		 15
15		 0.51
0.69		 14
14		 -5.655 0.000 S
Turbidity (NTU) Well water
Stream water		 111.47±45.94
68.77±20.91		 15
15		 177.91
81.01		 14
14		 1.518 0.151 NS
EC (µs/cm) Well water
Stream water		 822.31±35.65
816.79±37.87		 15
15		 138.06
146.65		 14
14		 0.137 0.893 NS
TDS (mg/l) Well water
Stream water		 474.6±18.50
477.1±24.39		 15
15		 71.65
94.46		 14
14		 -0.110 0.914 NS
Total coliform(x104 cfu/ml) Well water
Stream water		 5.8±0.44
6.1±0.59		 15
15		 2.98
3.97		 14
14		 -0.560 0.578 NS
Faecal coliform(x104 cfu/ml) Well water
Stream water		 5.1±0.27
8.0±0.37		 15
15		 1.83
2.46		 14
14		 -8.359 0.000 S
Aluminium (mg/l) Well water
Stream water		 0.102±0.013
0.146±0.028		 15
15		 0.05
0.11		 14
14		 -1.615 0.129 NS
Cadmium (mg/l) Well water
Stream water		 0.010±0.003
0.063±0.018		 15
15		 0.01
0.07		 14
14		 -3.009 0.009 S
Lead (mg/l) Well water
Stream water		 0.016±0.003
0.067±0.020		 15
15		 0.01
0.08		 14
14		 -2.582 0.022 S
Chromium (mg/l) Well water
Stream water		 0.021±0.005
0.081±0.021		 15
15		 0.02
0.08		 14
14		 -3.255 0.006 S

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