Ecology Wetlands : The clean Water Act was passed by Congress more than 30 years

Question

Ecology Wetlands: The clean Water Act was passed by Congress more than 30 years ago. Since then, government agencies have carefully monitored water quality and its effect on wetlands. (Reference: Environmental Protection Agency Wetland Report EPA 832-R-93-005). Of particular concern is the concentration of nitrogen in water draining from fertilized lands. Too much nitrogen can kill fish and wildlife. Suppose a student intern working for the Environmental Protection Agency has been studying the nitrogen concentration in a lake receiving drainage from a local golf course. Twenty-eight samples of water were taken at random from the lake. The nitrogen concentration (milligrams of nitrogen per liter of water) was determined for each sample.

a) Identify the variable. _____________________________________________________________

b) Is the variable quantitative or qualitative? ______________________________________________

c) What is the implied population? ______________________________________________________

Explanation / Answer

a)

the nitrogen concentration in a lake receiving drainage from a local golf course

b)

quantitaive because you will study the nitrogen concentration (milligrams of nitrogen per liter of water)

c)

Twenty-eight samples of water were taken at random from the lake

so the population is the water of the lake

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