The U.S. Of Energy provides ruci cconomy information for a variety of motor SELF test vehicles. A sample of 10 automobiles is shown in Table 1.6 (Fuel Economy website, Feb- ruary 22, 2008). Data show the size of the automobile (compact, midsize, or large), the number of cylinders in the engine, the city driving miles per gallon, the highway driving miles per gallon, and the recommended fuel (diesel, premium, or regular). a. How many elements are in this data set? b. How many variables are in this data set? Which variables are categorical and which variables are quantitative? d. What type of measurement scale is used for each of the variables? C. 3. Refer to Table 1.6. SELF test What is the average miles per gallon for city driving? b. On average, how much higher is the miles per gallon for highway driving as compared to city driving? a. TABLE 1.6 FUEL ECONOMY INFORMATION FOR 10 AUTOMOBILES City MPG Highway MPG Car Size Cylinders Fuel 12 13 19 Premium Large Compact Midsize Audi A8 BMW 328XI 6. 17 25 Premium 25 Regular Premium Cadillac CTS 16 13 18 Chrysler 300 Ford Focus Large Compact Midsize Regular Regular Diesel Regular Regular Regular 24 33 25 33 Hyundai Elantra Jeep Grand Cherokee Midsize 6. 17 26 6. 15 22 Compact Midsize Pontiac G6 21 31 Toyota Camry Volkswagen Jetta Compact 21 29

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

2. The U.S. Department of Energy provides fuel economy information for a variety of motor vehicles. A sample of 10 automobiles is shown in Table 1.6 (Fuel Economy website, Feb- ruary 22, 2008). Data show the size of the automobile (compact, midsize, or large), the number of cylinders in the engine, the city driving miles per gallon, the highway driving miles per gallon, and the recommended fuel (diesel, premium, or regular). a. How many elements are in this data set? b. How many variables are in this data set? c. Which variables are categorical and which variables are quantitative? d. What type of measurement scale is used for each of the variables?