Table 3: Independent sample T-test for difference in concentration of stream 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		 29.5±0.36
26.7±0.24		 15
15		 1.39
0.92		 14
14		 6.536 0.000 S
pH Dry season
Rainy season		 7.6±0.18
7.4±0.16		 15
15		 0.69
0.64		 14
14		 1.015 0.319 NS
Turbidity (NTU) Dry season
Rainy season		 68.77±20.91
111.35±33.86		 15
15		 81.01
131.14		 14
14		 -1.070 0.294 NS
EC (µs/cm) Dry season
Rainy season		 816.79±37.87
651.40±33.70		 15
15		 146.65
130.52		 14
14		 3.263 0.003 S
TDS (mg/l) Dry season
Rainy season		 477.1±24.39
364.2±18.85		 15
15		 94.46
73.02		 14
14		 3.662 0.001 S
Total coliform(x104 cfu/ml) Dry season
Rainy season		 8.6±1.54
7.9±0.47		 15
15		 5.97
1.84		 14
14		 0.430 0.673 NS
Faecal coliform(x104 cfu/ml) Dry season
Rainy season		 7.8±0.70
9.3±0.47		 15
15		 2.69
1.82		 14
14		 -1.787 0.085 NS
Aluminium (mg/l) Dry season
Rainy season		 0.146±0.028
0.535±0.129		 15
15		 0.11
0.50		 14
14		 -2.951 -2.951 S
Cadmium (mg/l) Dry season
Rainy season		 0.063±0.018
0.252±0.100		 15
15		 0.07
0.39		 14
14		 -1.853 0.084 NS
Lead (mg/l) Dry season
Rainy season		 0.067±0.020
0.518±0.167		 15
15		 0.08
0.52		 14
14		 -2.680 0.018 S
Chromium (mg/l) Dry season
Rainy season		 0.081±0.021
0.372±0.121		 15
15		 0.08
0.37		 14
14		 -2.378 0.031 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