• 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
  7. 7
    7
  8. 8
    8
  9. 9
    9
  • Level: GCSE
  • Subject: Maths
  • Word count: 1266

Gary’s Car Sales

Extracts from this document...

Introduction

Gary’s Car Sales

Aim

The aim of this assignment is to find out what factors affect the second hand price of cars.

Hypothesis

I think the second hand price of a car mainly depends upon two of the three factors of age, mileage and engine size, but also other smaller factors such as central locking and air conditioning etc. For this assignment however we were only asked to concentrate on information that we were given such as the age, make of car, mileage and engine size.

To test if my theory is correct I will make an equation that will tell me the second hand price of a car if I input certain characteristics like the age and mileage. To do this, I will first have to plot scattergraphs and create equations from them first before making the overall equation for everything.

Method

To find out which of the factors made the most difference, I made scattergraphs on each factor against the second hand price, with a line of best fit to help show correlation’s and to help create a formula.

...read more.

Middle

 (All cars NP added together)    (No. Of cars in Gary’s garage)

                379520                        /                    36                         =10542.22 (2 d.p)

 This makes this straight-line equation complete

Y=MX+C becomes 4456.39=714.28*5.8 + 10542

Or

SHP = G1A + NP(new price)

Next was the theory that the mileage may affect the 2nd hand price

The graph here shows all the cars mileage plotted against the second hand price.

Once again you can clearly see the negative correlation, showing that when the mileage increases, the second hand price decreases.

The marks ringed in red do not add to the correlation pattern. As with most scattergraphs, there are always a few that do not follow the trend of the others

The equation for this graph is basically the same as the other

Y = MX + C becomes 4456.39=225.17*55195(the average mileage) + 10542

Or

SHP =  G2M + NP

(M being for the mileage)

The next factor to consider was the Engine size

From the graph opposite, you can clearly see that there is very little correlation at all in the SHP against the engine size and therefore doesn’t affect the second hand price enough to be able to make an equation from.

...read more.

Conclusion

I am 70% out which, once again is not what we want.

The closest of these was the first test, where the formula was only about 6% out.

We can see that there is not enough information in the formula to give exact results, but we still may be able to get closer results by adding more to this equation.

Conclusion

My aim of this investigation was to find out what the second hand price of a car depends upon in Gary’s garage.

My theory at the beginning was that the two main factors of Age and Mileage would have the greatest influence and the engine size would have a slightly less influence, but still add in some way to the coat of the SHP.

I have drawn scattergraphs and noted correlation’s and have found out that yes, my theory was correct, as shown in my scattergraphs. The Mileage and Age affect the 2nd hand price greatly whereas the engine size does not show any affect, but it would change the second hand price in some way.

Although I did find a formula, it is nowhere near as accurate as it could have been, had I been given the right information, suc

...read more.

This student written piece of work is one of many that can be found in our GCSE Gary's (and other) Car Sales 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

See related essaysSee related essays

Related GCSE Gary's (and other) Car Sales essays

  1. CAR SALES MATHS COURSEWORK

    I still however feel that other variables can affect the price. Earlier I plotted the graph for engine size ans price when new, now I will plot a graph for engine size and price decrease/age. This should hopefully give an insight in to the factors which most effect the price of a car.

  2. Used Cards - find which factors will influence the price of a second hand ...

    The formula, which is known as the Product Moment Correlation or r is: (Where and are the means of x and y values respectively) The value of r determines the correlation; moreover the value is always between -1 and 1.

  1. T-Total Maths

    T TOTAL 10 57 11 62 12 67 13 72 14 77 15 82 16 87 Numbers inside T shape 10 11 12 3 21 11 12 13 4 22 12 13 14 5 23 13 14 15 6 24 14 15 16 7 25 15 16 17 8 26

  2. Maths - statistical driving test

    The best instructor seems to be instructor C followed by D then B then A. I have acknowledged that while my hypothesis two only investigates the number of lessons, mistakes and the instructor I feel it is necessary to recognise that there may be a lack in validity as there

  1. Car sales

    I did this by checking that there weren't any 'silly' results e.g. a car that is 1million years old. I used scatter graphs because you can easily subtract information from it and its quick and easy to use. On the graph I entered a trend line to show whether there is a positive or negative correlation.

  2. Used second hand cars

    However, I can ensure that all the listed calculations and the illustrations will be used according to their needs. Most of the calculations and the presentation of the data are going to be conducted using ICT skills as required for this project.

  1. Maths Coursework: Car Sales

    If this were the case, the car sellers would give money to those who will buy the car, which does not happen. And also if the graph was examined more carefully, another fact could have been revealed. The residue value is getting smaller as age increases.

  2. Gary's Car Sales.

    32 �4,800 4 15 �9,400 7 33 �1,900 1 16 �5,200 10 34 �2,700 1 17 �4,350 11 35 �7,300 3 18 �7,790 8 36 �6,300 7 If you look at graph #1, you will see that I was wrong.

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