Reference no: EM132472555 , Length: 1500 Words

SCIE2267 Quantitative Methods in Environmental Management Assignment, Faculty of Science - The University of Western Australia

QUESTION - The two data setsarePCB1 and PCB2. In both data files the response variate is the concentration of polychlorinated biphenyl (PCB) residue in fish (Yellowfin Bream) caught from two different lakes. The PCB1 measurements are from homebush lake and the PCB2 measurements are from swan lake.

For both data sets the explanatory variable is the age of the fish. The PCB measurements are in mg per kg of fish body weight. As the fish in the lake were stocked as yearlings, and tagged at release, their age is known. To obtain a measure of the PCB concentration in the fish lethal methods were required. The fish vary in age from one year to 12 years. The relationship of interest is whether or not the PCB concentration in the fish increases the longer they have been in the lake.Specifically, both lakes are known sites of PCB contamination. However, it is thought that the PCBs may settle over time and be covered with sediment. If the PCBs settle to the bottom of the lake and are covered by sediment, there should be no relationship between fish age and the PCB concentration in the fish sampled. If the PCBs are still present in the water then the PCB concentration in the fish will increase with fish age. The environmental safe level for PBC concentrations is deemed to be 0.5 mg per kg of fish weight.

The State government has employed you to prepare a report on the relationship between the PCB concentration and fish age in the two lakes, and to provide an assessment of overall PCB safety at each lake, based on your assessment of PC concentration in the fish.

Note - The word limit for the report is 1,500 words. Do not feel compelled to use the full word limit. This is a generous word limit so write as much as you think you need to complete the report only.

Attachment:- Quantitative Methods in Environmental Management Assignment File.rar