After a heavy storm, the waste water holding tanks at a waste water treatment pl

Question

After a heavy storm, the waste water holding tanks at a waste water treatment plant on the New River overflowed dumping 1,000,000 gallons of sewage into the New River. You are part ofthe New River Citizen Watch Group, which monitors the health of portions of the New River for government agencies like the EPA and USDA. This sewage discharge event causes your group to wonder if the event has had a negative impact on the quality of the water downstream of the waste water treatment plant. To test your group's idea that the sewage has negatively impacted water quality, you measure in triplicate the EPT of a site upstream of the waste water treatment plant and a site downstream of the waste water treatment plant. You calculate the mean 9% EPT of both sites and the 95% confidence intervals of both samples. Your results are shown below. Use this scenario and data to answer the following questions. 120 1000 60 Upstream site Downstream site

Explanation / Answer

1.

option 4 should be correct the hypothesis neither accepted nor rejected because the data having so much standard deviation so we can not conclude anything with this experiment ( the higher level of standard deviation in downstream water is more than the lower level of standard deviation in upstream water.So with this much variation in values we can not conclude the hypothesis.

2.

Calculating the mean percentage of EPT

The EPT Richness Index estimates water quality by the relative abundance of three major orders of stream insects that have low tolerance to water pollution.

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