Is the variable quantitative or qualitative? What is the implied population? Adv

Question

Is the variable quantitative or qualitative? What is the implied population? Advertising: Auto Mileage What is the average miles per gallon (mpg) for all new cars? Using Consumer Reports, a random sample of 35 new cars gave an average of 21.1 mpg. Identify the variable. Is the variable quantitative or qualitative? What is the implied population? Ecology: Wetlands Government agencies carefully monitor 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. 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. Identify the variable. Is the variable quantitative or qualitative? What is the implied population?

Explanation / Answer

Solution:-

8)

a) The variable is the average miles per gallon.

b) The variable is quantitative.

c)The implied population is random sample of 35 new cars.

9)

a) The variable is concentration of nitrogen in water draining from fertilsed lands.

b) The variable is quantitative.

c) 8 samples of water taken at random from a lake.

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