Business Statistics
-------------------------------------------------
Introduction:
This data set we have been assigned to analyze highlights the fuel-efficiency of the mentioned cars relative to several other variables.
One of the major issues most stressed upon to date is the ever-increasing threat of environmental degradation, global warming, and the need to conserve our scarce natural resources. This has led us to examine the fuel efficiency of cars. With rising gas prices, owning a car can become quite costly, not only eroding the owners disposable income, but also the Earth of its resources. It is not surprising that more and more consumers now desire to change their car, with fuel-efficiency being a major determinant. Since consuming less fuel is an important criterion, we believe that examining the relationship between different variables of cars and fuel-efficiency is a necessary study.
In order to get a true representation of the car population, we have used the data from a sample observing 20,001 cars of various classes, engine sizes, types, makes and models between the years 1978 to 2008. To fully incorporate the impact of weight on fuel efficiency (lurking variable) we also noted down the number of doors, passengers and luggage present in the car. The sample also includes the type of fuel used to see its effect on fuel efficiency.
Our goal will be to analyze the relationship between the transmission of the car, its size (class), the year of manufacture, the number of cylinders and engine displacement and fuel efficiency. Cars that can drive more miles per gallon of fuel used will be the most fuel-efficient. Inversely, cars that consume a lot of fuel will not be fuel-efficient.
Question 1-
-------------------------------------------------
Transmission vs. Fuel Efficiency
In order to analyze the relationship between the transmission cars and fuel efficiency, we look at the following question:
What is the relationship between the transmission of the
Introduction:
This data set we have been assigned to analyze highlights the fuel-efficiency of the mentioned cars relative to several other variables.
One of the major issues most stressed upon to date is the ever-increasing threat of environmental degradation, global warming, and the need to conserve our scarce natural resources. This has led us to examine the fuel efficiency of cars. With rising gas prices, owning a car can become quite costly, not only eroding the owners disposable income, but also the Earth of its resources. It is not surprising that more and more consumers now desire to change their car, with fuel-efficiency being a major determinant. Since consuming less fuel is an important criterion, we believe that examining the relationship between different variables of cars and fuel-efficiency is a necessary study.
In order to get a true representation of the car population, we have used the data from a sample observing 20,001 cars of various classes, engine sizes, types, makes and models between the years 1978 to 2008. To fully incorporate the impact of weight on fuel efficiency (lurking variable) we also noted down the number of doors, passengers and luggage present in the car. The sample also includes the type of fuel used to see its effect on fuel efficiency.
Our goal will be to analyze the relationship between the transmission of the car, its size (class), the year of manufacture, the number of cylinders and engine displacement and fuel efficiency. Cars that can drive more miles per gallon of fuel used will be the most fuel-efficient. Inversely, cars that consume a lot of fuel will not be fuel-efficient.
Question 1-
-------------------------------------------------
Transmission vs. Fuel Efficiency
In order to analyze the relationship between the transmission cars and fuel efficiency, we look at the following question:
What is the relationship between the transmission of the