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GCSE statistics coursework

Extracts from this document...

Introduction

                              GCSE statistics coursework

   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 prediction should show that

  • As the car increases its price will decrease
  • The higher the mileage the price will decrease.

Plan

     I am going to be collecting a sample of 100 cars. I will find mean, median, mode and range for some certain makes of cars, from the data I have been given. I will then represent my data by the following diagrams

  • Bar charts
  • Tally charts
  • Pie charts
  • Standard deviation (mean and mean deviation)
  • Scatter diagrams.

   The reason why I am doing so many diagrams is to give a clear understanding and also to give the reader

...read more.

Middle

10001-20000

2

20001-30000

1

30001-40000

3

40001-50000

0

50001-60000

2

60001-70000

0

70001-80000

0

80001-90000

1

90001-100000

0

100001-110000

0

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

Mileage

Tally

Frequency

0-10000

0

10001-20000

0

20001-30000

4

30001-40000

1

40001-50000

2

50001-60000

3

60001-70000

1

70001-80000

2

80001-90000

0

90001-100000

0

100001-110000

0

As you can see I have provided another data for a different model of cars which shows my prediction is true. The reason why I am providing diagrams for different makes of cars is because to get more accurate results.

Conclusion for tally charts

After my tally chart investigation I have provided mileage and the frequency for different makes of cars to go into deeper investigation. I am aiming to go slowly my making different diagrams at different times so there would be no confusion, so therefore I would be going on to pie charts.

...read more.

Conclusion

Doughnut chart

Make

Frequency

Fiat

5

Peugeot

10

Rover

12

Vauxhall

13

Ford

16

image02.png

I would now provide the mean, median and mode for the cars. First I will start with the make for Ford and the other makes to get more information.

Scatter diagrams image03.png

image04.png

By looking at the first scatter diagram, which is price and age of cars for ford, shows that as the age of car increases the age decreases. As you could you see the line of best fit, which shows us that what happens to the cars.

In the second scatter diagram, which shows the price and age of cars for Vauxhall only. As you could see again as the age increases the price decrease because the higher the age means it has been used a lot, so customers would give low prices.  

image05.png

...read more.

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