Q 36. - The Practice of Statistics for AP

Question

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.

Step-by-Step Solution

Answer

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

Part (b) The result is: 

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

Part(a) Step 1: Given information

Given data : 

Make and model vehicles vehicle vehicle	Vehicle type transmission transmission	Transmission type number number	Number of cylindricity	City mpg	Highway mph Aston
Aston Martin Vantage	Two-seater		8	12	19
Honda Civic	Subcom-pact		4	25	36
Toyota Prius	Midsize		4	48	45
Chevrolet Impala	Large		6	18	29

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.

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 vehicle	Vehicle type	Transmission type	Number of cyclinder	City mpg	Highway mpg
Aston Martin Vantage	Two-seater	Manual	8	12	19
Honda Civic	Sub-com	Automatic	4	25	36
Toyota Prius	Mid-size	Automatic	4	48	45
Chevrolet Impala	Large	Automatic	6	18	29

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 variable	Variable type
1	Vehicle type	Categorical
2	Transmission type	Categorical
3	Number of cyclinder	Quantitative
4	City mpg	Quantitative
5	Highway mpg	Quantitative