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Difference of Means T-test and the Canadian Fuel Consumption Report (2015): Automobile Fuel Consumption and Transmission Type

Dataset
By: The Odum Institute Published: 2015 | Product: SAGE Research Methods Datasets
Methods: T-test
Data Type: Numeric
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Abstract

This dataset example introduces readers to a difference of means t-test. Difference of means testing allows researchers to compare the mean of a single variable based on two categories of another variable. There are many variants of difference of means testing – this example focuses on the independent samples t-test. This example uses a subset of data from the 2015 Fuel Consumption Report from Natural Resources Canada. It compares the average level of fuel consumption by automobiles under city driving conditions for those with automatic transmissions to those with manual transmissions. Results from analysis like this could inform both automakers and policy makers regarding the environmental effects of automobile design.

In this example, readers are introduced to the basic theory and assumptions underlying this technique, the ...

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About This Dataset
Data Source Citation

Natural Resources Canada. (2015). Fuel consumption ratings [Data file]. Retrieved from http://data.gc.ca/data/en/dataset/98f1a129-f628-4ce4-b24d-6f16bf24dd64

Full title of originating dataset

2015 – Fuel Consumption Ratings

Data author(s) and affiliations

Natural Resources Canada, Government of Canada

Data Universe

Vehicles for retail sale in Canada

Funding sources/suppliers

Natural Resources Canada

Dataset contains information licensed under the Open Government Licence - Canada (http://open.canada.ca/en/open-government-licence-canada)

Data collection dates

2015

Unit of analysis

Vehicles

Location covered by data

Canada

Links to SRM content
List of variables

year

Year

make

Make

model

Model

class

lCass

enginesize

Engine Size

fuelusecity

Fuel Use City

fuelusehwy

Fuel Use Highway

fueluseboth

Fuel Use Combined

mpgboth

MPG Combined

co2emissions

CO2 Emissions

cylinders468

Num of Cylinders

cylinder4

4-cylinder

cylinder6

6-cylinder

cylinder8

8-cylinder

trans2

Transmission

fuel

Fuel Type