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I am going to analyse the given data from a used car sales person to see whether we can find out the price of the cars to sell in the garage.

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Introduction

Mr McEvoy                                        Doha Salameh

10.1/JCU

Brief-

       I am going to analyse the given data from a used car sales person to see whether we can find out the price of the cars to sell in the garage.

Hypothesis –

        There are different factors in the data. However certain factors affect the price more than others, for example; the age, mileage and the size of the engine. Age is important because the older it is the least it will cost. The bigger the engine size, the more it will cost and the more mileage it uses up, the least it will cost.

       I am now going to analyse the piece of data by doing random sampling. I think that this is the best type of method because it is easier and faster, also because it is fairer. I will do this by choosing every odd numbered car.

       To compare the original price between the mileage, engine size and age, I am going to do three scatter diagrams. Then I will compare the three correlations. I expect that

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Middle

8

1.1

90000

35

Ford Fiesta

1495

11

1.8

74000

37

Renault Clio

1995

8

1.2

47000

39

Renault Clio

1495

9

1.2

98000

41

BMW 316i

6995

6

1.8

71000

43

Ford Fiesta LX

1995

7

1.1

60000

45

Ford Escort Duet

2300

7

1.4

64000

47

Vauxhall Astra

2900

6

1.6

58000

49

Daewoo Nubira

6895

4

2

14730

51

Volkswagen Golf

3595

6

1.8

58000

53

Ford Escort

4700

5

1.8

34000

55

Fiat Punto

4500

3

1.2

13000

57

Ford Fiesta

3200

4

1.8

27000

59

Rover 623GSi

2975

5

2.3

96000

61

Fiat Bravo

6795

1

1.2

3000

63

Volkswagen Golf Gti

6995

5

2

35000

65

Ford Puma

8250

3

1.4

34000

67

Peugot 406

7500

1

2

17500

69

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Conclusion

      The equations that I came out with were only an estimate of what the price could be. The original price of the Ford Orion was £7999. When I combined all three equations together, added them up, divided by three and then substituted the example into the equation the price resulted into being £4144. In my opinion I think that it is impossible to work out equations for the three graphs and an average for the price even if you based it on the equation y= mx + c. The equations are always going to be an estimate; they can not be definite equations that give you completely accurate results.

      To improve the procedures of my ‘Car Sales Project’, I would like to do graphs for every piece of data including every car on the table. This will enable me to have a wider range of results and more accurate data and graphs. Another area of improvement I think is to do more examples so that I can compare between them and so that I am not depending on only one or two examples. The more examples, the more evidence you have with you. I would also like to keep trying to come out with correct equations that definitely work.      

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