# Car Prices Coursework

Car Prices Coursework

In the near future I am going to be looking to buy car to get around in either when I leave school or when I am in the Sixth form.  I am a bit confused about how car prices work and if they go down more due to their age or to the amount of mileage there is on the clock or any other reasons.  I have set myself the task of investigating car prices.

My Hypothesis’ are:

1. The higher the mileage the cheaper the car.
2. The older the car the cheaper it is.
3. The car model effects the price a lot.

I considered where I should take the data from. I thought a bit and I was dicing between doing primary or secondary sampling, finally I choose to use secondary data because I felt that if I had chose to do primary sampling I could have run into unforeseeable problems in the future.

The next thing I had to decide was where I was going to take my data from. I first instinct was to take it from the local newspaper in the car adverts section, but then I thought that might be a little biased or wrong because I am only taking the data from one region and the same car might cost more in a different region.  Now I couldn’t go to each region in England to collect my data, I had to overcome this problem.  I decided to go onto the Internet to find the data. I went on  where I found some car prices. I took a sample from each region randomly and then sorted my data. I decided to limit my data to certain makes of car because I felt if I mixed the types of car up (i.e. a luxury car with a family salon) it could give me odd results. I decided to use “normal, every day sort of cars” cars that have high production each year (i.e. not a Ferrari that only makes 350 per year.)

## My First Hypothesis

As I have already explained why I am conducting this investigation I promptly started to investigate the Mileage of the car against the price. I think that the mileage has a lot to do with the price of cars and I feel there will be a lot of positive correlation because in my experience of cars the higher the mileage the lower the price. At first I solely thought that the cars price depended on the mileage.

My first part of investigating was to produce a scatter graph on Excel and use a ...