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Chapter 1: Q 36. (page 26)

Fuel economy (Introduction) Here is a small part of a data set that describes the fuel economy (in miles per gallon) of model year 2009 motor vehicles:

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

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

Short Answer

Expert verified

Part (a) The individuals in the given data set are vehicles.

Part (b) The result is:

S.No.Measurement variable variableVariable type
1Vehicle typeCategorical
2Number of cylinder
Categorical
3Number of cylinder
Quantitative
4City mpg
Quantitative
5Highway mpg
Quantitative

Step by step solution

01

Part(a) Step 1: Given information

Given data :

Make and model vehicles vehicle vehicleVehicle type transmission transmissionTransmission type number numberNumber of cylindricityCity mpgHighway mph Aston
Aston Martin VantageTwo-seater
81219
Honda CivicSubcom-pact
42536
Toyota PriusMidsize
44845
Chevrolet ImpalaLarge
61829
02

Part (a) Step 2: Concept

Data concerning two categorical variables are organized in a two-way table of counts. Two-way tables are frequently used to summarize vast volumes of data by categorizing outcomes.

03

Part (a) Step 3: Explanation

We have information on fuel economy (in miles per gallon).

Vehicles are the persons in the given data collection.

Make and model vehicleVehicle typeTransmission typeNumber of cyclinderCity mpgHighway mpg
Aston Martin VantageTwo-seaterManual81219
Honda CivicSub-comAutomatic42536
Toyota PriusMid-sizeAutomatic
44845
Chevrolet ImpalaLargeAutomatic
61829
04

Part (b) Step 1: Explanation

Vehicle Type, Transmission Type, Number of Cylinders, City mpg, and Highway mpg are the five variables that must be measured from the above data set.

S.No.Measurement variable variableVariable type
1Vehicle typeCategorical
2Transmission typeCategorical
3Number of cyclinderQuantitative
4City mpgQuantitative
5Highway mpgQuantitative

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