a) Industrial wastewater discharge into rivers has an impact on the water's quality. Investigators collected ten water samples along a 10 km upstream route and another eight water samples along a 10 km downstream route from a specific power plant to determine the impact on water quality. Each specimen's alkalinity was measured in milligrammes per litre (mg/1), and the results are shown in the following table: Upstream Downstream Total 2284 1836 Sample Std Dev 1.45 1.28 i. Conduct a test at a = 0.05 whether the variability of the discharge of industrial wastewater into river affects water quality along a 10 km upstream route is higher than 2 (mg/1²

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a) Industrial wastewater discharge into rivers has an impact on the water's quality.
Investigators collected ten water samples along a 10 km upstream route and
another eight water samples along a 10 km downstream route from a specific
power plant to determine the impact on water quality. Each specimen's alkalinity
was measured in milligrammes per litre (mg/1), and the results are shown in the
following table:
Upstream
Downstream
Total
2284
1836
Sample Std Dev
1.45
1.28
i. Conduct a test at a = 0.05 whether the variability of the discharge of
industrial wastewater into river affects water quality along a 10 km upstream
route is higher than 2 (mg/l)².
Transcribed Image Text:a) Industrial wastewater discharge into rivers has an impact on the water's quality. Investigators collected ten water samples along a 10 km upstream route and another eight water samples along a 10 km downstream route from a specific power plant to determine the impact on water quality. Each specimen's alkalinity was measured in milligrammes per litre (mg/1), and the results are shown in the following table: Upstream Downstream Total 2284 1836 Sample Std Dev 1.45 1.28 i. Conduct a test at a = 0.05 whether the variability of the discharge of industrial wastewater into river affects water quality along a 10 km upstream route is higher than 2 (mg/l)².
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