# Investigate the affect that age has on a car in terms of performance and structural integrity

GCSE statistics coursework

### Introduction

In this coursework I am going to investigate the affect that age has on the car. I am going to look at price, engine size, mileage, and age of the car.  By the end of the coursework I am aiming to have a set of results about how the cars are affected by the age, price and mileage.

My hypothesis should state that

1. As the age of the car increases its price will decrease

2.  The higher the mileage the lower the price.

I would meet this entire hypothesis by providing the diagrams below. For scatter diagrams I would be doing the line of best fit.

Plan

I am going to be collecting a sample of 100 cars.

• Box plots
• Cumulative frequency
• Scatter diagrams.

The reason why I am doing these diagrams is to give a clear understanding and also to give the reader a pictorial view about what is happening, and also I must say to get more accurate results. I would do each graph for each type of car and compare the results. After each of the diagram I would explain how I did the diagram. At the end of the coursework I would be doing a conclusion explaining what has happened and why. I have hosen 100 cars randomly fro the database instead of 1402 because I think it would cause inaccurate results. When I say randomly I mean I the cars that would give better results.

I am going to calculate the number of each type of car according to its age and mileage. I would provide my entire hypothesis to get more accurate results and also to include my prediction. I would provide me working on computer to avoid biased results and also to get more accurate results. I think doing my investigation on computer would give a better pictorial view than by hand.

I will look at 3 different makes of cars in my sample for tally only.

This is for ford only

I would provide another tally chart but this time I would make it for a different model of car. I would investigate a different mileage of different cars to go into deeper investigation.

## This is for fiat only

I have shown the above data on the graph above. This shows that my prediction was correct and as there are hardly any cars with a very high mileage and there are only a few smaller mileages.

For Vauxhall cars only

As you can see I have provided another data for a different model of cars which shows my prediction is true. The reason why ...