# To find out what affects the prices of used cars - I will be looking at the two different variables age and mileage to find out if they effect the prices of used cars.

Aim

To find out what affects the prices of used cars. I will be looking at the two different variables age and mileage to find out if they effect the prices of used cars.

Hypothesis

I think that the mileage has a lot to do with the price of cars and I feel there will be a lot of positive correlation because in my experience of cars the higher the mileage the lower the price. As the mileage, increase the price decrease. Also I believe that the cars age will have more effect than the mileage on the price because as the average age for car increase the price decrease. I think that this is because if the car is old or it has a high mileage then it is more likely to need service.

Method

My first part of investigating was to look at the data sheet. Then think of the way I would do the sampling I had three different ways in which I could have done my sampling in stratified, which is a sample in which the population randomly sampled. Anther one is random sampling which is   choosing sample at random Lastly, selective sampling which is a selective sample is one which every nth term is chosen where n is chosen at random. I considered all three, I chose selective sampling because it s the easiest, and would ...