My task for this coursework is to statistically analyse the data given to me regarding Gary's used car sales. I shall begin with looking at the data.

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NILESH HUDIA        MATHS COURSEWORK 2        NOVEMBER 2001

My task for this coursework is to statistically analyse the data given to me regarding Gary’s used car sales. I shall begin with looking at the data. The following data was given to me.

 

The first question which occurred to me was, is there any correlation between the difference between the price when new and the age. I expected there to be a positive correlation if there was one, showing that as the age went up, the drop in price from when the car is new and when it is re-sold increases. Below is a table of the Price differences and the age.

 

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If you look at graph #1, you will see that I was wrong. There was no correlation between the price difference and the age. After seeing this, I thought that if I found what percentage of the original price the price difference is I could plot that in a scatter diagram to find the correlation between the depreciation percentage and the age. I found the depreciation with the equation

            D=100-((o-p)*100)

Where D= Depreciation, o= the original price and p= price when used

 

 

 

 

 

Looking at graph #2, which shows the scatter diagram of the ...

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