Nitrate concentrations above 50ppm in groundwater are not desirable for human consumption. Groundwater samples were taken from newly drilled boreholes in Northern Ghana for water quality analysis. The...

Extracted text: Nitrate concentrations above 50ppm in groundwater are not desirable for human consumption. Groundwater samples were taken from newly drilled boreholes in Northern Ghana for water quality analysis. The nitrate concentrations were as follows: 10, 87, 15, 29, 19, 109, 112, 45.5, 22, 99, 27, 88, 55, 5.5, 10.7, 9.7, 20.5. Determine at 95% level of confidence if groundwater in the area is of good quality.