• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month
Page
1. 1
1
2. 2
2
3. 3
3
4. 4
4
5. 5
5
6. 6
6

# Which three factors affect the price of a second hand car.

Extracts from this document...

Introduction

Richard Price 10B

Used Car Prices:

Coursework

###### Aim

The aim of this project is to decide which three factors affect the price of a second hand car. I will choose the three factors, which I think, will influence the price the most out of several lines of enquiry.

## Introduction

I plan to investigate what factors influence the price of a second hand car. To begin with I had to look at a database of 100 cars. This database gave me a lot of information about each car (e.g. age, air con, mileage etc). All these factors were my lines of enquiry. To choose my three factors I had to decide which three of the eighteen factors would affect the price the most.

## Lines Of Enquiry

There are a few lines of enquiries, which could be possible factors in affecting a second hand cars price. To choose my three factors I put all the lines of enquiry into a list from most important (1) to least important (18)

1. Mileage – This is my top factor because it tells you exactly how long the car has left in it. If the mileage is high it means the car has traveled far and may be in need of repair.
2. Age – This tells you how long the

Middle

8

1.6

80

73%

43000

7

1.8

84

37%

21000

4

1.4

88

83%

49000

8

1

92

46%

50000

5

1.4

96

74%

57000

5

1.8

100

63%

52000

5

1.8

MEAN

67%

41108

6

2

After drawing up this table I highlighted the two columns I wanted to draw a graph for and drew an xy scatter graph. I drew on a line of best fit myself, because a simple point which is way above the others, for example the engine size of 4 on car number 56, would have sent the line of best too high when I know that it was just a one off.

##### Collecting Data For Stratified Sample (Method)

It is important to do a stratified sample because one car make might be less desirable for second hand car dealers than another and therefore have dropped its price dramatically. So to keep it fair I had to choose the right amount of each car. For this data I had to draw up a frequency table showing all of the car makes. Once I had did this I had to work out how to select the right amount of each model to make a fair test.

 Car Model Frequency Amount Needed Number picked Ford 16 4 35,53,80,99 Vauxhall 13 3 10,26,84 Rover 12 3 19,32,75 Fiat 10 3 24,34,55 Volkswagen 7 2 30,79 Nissan 6 2 20,58 Renault 5 1 39 Peugeot 5 1 67 Mercedes 3 1 2 Citroen 3 1 42 Daewoo 3 1 50 BMW 2 1 13 Mitsubishi 2 1 17 Hyundai 2 1 36 Rolls Royce 1 0 - Toyota 1 0 - Seat 1 0 - Lexus 1 0 - Bentley 1 0 - Honda 1 0 - Porsche 1 0 - Landrover 1 0 - Audi 1 0 - Suzuki 1 0 - Mazda 1 0 -

To obtain the amount needed I had to take the number of cars in the database (100) and divide it by 4 to obtain the 25 which I wanted.

Conclusion

1. People don’t buy a car just because of its insurance group, when selling a car you don’t think that just because it has a high insurance group you should drop the price a lot.
2. The graph shows a correlation, however there are a lot of points well off the best fit line, this may suggest that this may be a coincidence.

Evaluation

This proves that the three factors I chose do affect the price of a second hand car. The order in which I put my top three lines of enquiry was also correct. So if you were selling a second hand car the age of the car the mileage it has done and the engine size will all drop the price of the car. To prove this was not just lucky I decided I would do one more graph against a factor, which I think will not affect the price and see if it has no correlation. I took the length of tax in months on the vehicle. The results I got confirmed that there was no correlation, which proves that age, mileage and engine size affect the price while the length of tax does not. However this investigation was done with only 25 cars to make a much more detailed conclusion I would of needed to take many more samples, to get the best result it would have been best to do it with all 100.

Page  of

This student written piece of work is one of many that can be found in our AS and A Level Probability & Statistics section.

## Found what you're looking for?

• Start learning 29% faster today
• 150,000+ documents available
• Just £6.99 a month

Not the one? Search for your essay title...
• Join over 1.2 million students every month
• Accelerate your learning by 29%
• Unlimited access from just £6.99 per month

# Related AS and A Level Probability & Statistics essays

1. ## I have been given the task of finding what affects the price of a ...

group against used price I used scatter graphs as they will display relationships between the data, which is why used price is in everyone. A scatter graph will also give me the ability to put a line of best fit in giving me the ability to predict future data.

2. ## Statistics. The purpose of this coursework is to investigate the comparative relationships between the ...

Sampling: The process of converting data into digital data by taking a series of samples or readings at equal intervals. This has its advantages: if I have a lot of data and want to find a general trend, then I can use sampling to find a general pattern between all

1. ## Statistics Coursework

92.11 157 95.53 198 98.16 239 100 35 78.16 76 86.58 117 92.37 158 95.79 199 98.16 240 100 36 78.42 77 86.84 118 92.37 159 95.79 200 98.16 241 100 37 78.68 78 86.98 119 92.37 160 95.79 201 98.16 242 100 38 78.95 79 87.11 120 92.37 161

2. ## Data Analysis of American House Price

By looking at the table it is clear that the majority of the houses with a pool have also a garage, with 58,18% (32 out of 55 houses with a pool); while 41,82% (23 out of 55) houses with a pool do not have a garage.

1. ## Used Cars - What main factor that affects the price of a second hand ...

Engine size The engine size of a second hand car can affect it price. As a small engine car would have less power and do more mile to the gallon than a larger engine car with more power but less miles to the gallon.

2. ## Do Left and right-handed people have roughly the same reaction time with their dominant ...

seconds 0.25 seconds 0.30 seconds 0.38 seconds 0.19 seconds 0.42 seconds 0.33 seconds 0.39 seconds

1. ## Estimating the length of a line and the size of an angle.

The list is arranged in the order of date of birth from biggest to smallest. Each student in the list has a number to represent them (with number one being the oldest student). They are not represented by their name this is because it is confidential information.

2. ## Design an investigation to see if there is a significant relationship between the number ...

The salinity of the sea may affect the growth rate of the algae, due to the effect it will have on the difference in water potential between the sea and inside the alga. This factor may vary throughout the year.

• Over 160,000 pieces
of student written work
• Annotated by
experienced teachers
• Ideas and feedback to
improve your own work