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 99% level of confidence if groundwater in the area is of good quality.

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Description: 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, 1

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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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 99% level of confidence if groundwater in the area is of good quality.

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Step 1

Confidence interval:

It is defined as the range which contains the value of true population parameter. The confidence interval is constructed for various population parameters like population mean, population standard deviation and so on.
The confidence interval can be interpreted as : With a stated level of confidence, it can be said that the true population parameter for which confidence interval is constructed lies with the obtained confidence interval.

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