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.

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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.
Transcribed Image 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.
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Statistical hypothesis testing is an important method in inferential statistics. It is used to test the hypothesis about the population parameters.

Statistical tests are used to calculate the test statistic and p-value. This test statistic and p-value will eventually be used to make decision on the rejection of null hypothesis.

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