Government agencies carefully monitor water quality and its effect on wetlands.† Of particular concern is the concentration of nitrogen in water draining from fertilized lands. Too much nitrogen can kill fish and wildlife. Twenty-eight samples of water were taken at random from a lake. The nitrogen concentration (milligrams of nitrogen per liter of water) was determined for each sample. (a) Identify the variable. ( Multiple Choice ) nitrogen concentration amount of water the 28 samples nitrogen concentration in the entire lake (b) Is the variable quantitative or qualitative? ( Multiple Choice ) quantitative neither quantitative nor qualitative both quantitative and qualitative qualitative (c) What is the implied population? ( Multiple Choice ) the 28 samples that were examined all the fish in the lake all lakes the entire lake.
Government agencies carefully monitor water quality and its effect on wetlands.† Of particular concern is the concentration of nitrogen in water draining from fertilized lands. Too much nitrogen can kill fish and wildlife. Twenty-eight samples of water were taken at random from a lake. The nitrogen concentration (milligrams of nitrogen per liter of water) was determined for each sample.
(a) Identify the variable. ( Multiple Choice )
nitrogen concentration
amount of water
the 28 samples
nitrogen concentration in the entire lake
(b) Is the variable quantitative or qualitative? ( Multiple Choice )
quantitative
neither quantitative nor qualitative
both quantitative and qualitative
qualitative
(c) What is the implied population? ( Multiple Choice )
the 28 samples that were examined
all the fish in the lake
all lakes
the entire lake.
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