What are the average miles per gallon mpg for all new carsUs

What are the average miles per gallon (mpg) for all new cars?Using Consumer Reports, a random sample of 35 new cars yielded an average of 21.1 mpg.

a. Identify the variable.

b. Is the variable quantitative or qualitative?

c. What is the implied population

Solution

The sample of new cars is 35 and their respective average is 21.1mpg

(a)

The variable of interest is the mileage of the new cars which is in miles per gallon and the given average is the parameter of this study which is representative of entire population.

(b)

The variable is a quantitative variable because it can be represent numerically.qualitative varibles can be expressed numerically.

(c)

The Implied Population is all the new cars launched in the market.