Fuel economy (Introduction) Here is a small part of a data set that describes the fuel economy (in miles per gallon) of model year 2012 motor vehicles:

Make and model Vehicle type Transmission type Number of cylinders City mpg Highway mpg Aston Martin Vantage Two-seater Manual 8 14 20 Honda Civic Hybrid Subcompact Automatic 4 44 44 Toyota Prius Midsize Automatic 4 51 48 Chevrolet Impala Large Automatic 6 18 30

(a) What are the individuals in this data set?

(b) What variables were measured? Identify each as categorical or quantitative.