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In my investigation of the car sales I will compare different models of cars which are Ford Vauxhall and Fiat with four different variables. The variables I will investigate are: Engine size Age Mileage Price Because price is my independent variable my dependent variables will be put against it: Engine size vs. Price Age vs. Price Mileage vs. Price I will now complete my investigation by examining the data on my selected car models. The data is shown as follows. Make Model Price (second Hand) Age Engine Mileage Owners Vauxhall Vectra £7999 2 2.5 20000 1 Vauxhall Astra £6595 4 1.6 30000 2 Vauxhall Tigra £7499 4 1.4 27000 2 Vauxhall Vectra £6499 4 2.5 49000 2 Vauxhall Corsa £4995 2 1.6 24000 1 Vauxhall Nova £1000 10 1.4 75000 4 Vauxhall Cavalier £850 10 1.6 73000 3 Vauxhall Astra £2900 6 1.6 58000 1 Vauxhall Corsa £4976 4 1.4 21000 2 Vauxhall Corsa £3495 6 1.2 55000 2 Vauxhall Calibra £6995 6 2 63000 2 Vauxhall Astra £3191 6 1.4 43000 2 Vauxhall Vectra £4995 5 1.8 52000 2 Fiat Bravo £3495 5 1.4 51000 2 Fiat Punto £3995 4 1.2 31000 1 Fiat Cinquecento £1995 6 0.9 20000 2 Fiat Uno £1495 8 1 51000 2 Fiat Tempra £1295 6 1.6 81000 2 Fiat Tipo £1500 7 1.4 32000 3 Fiat Punto £4500 3 1.2 13000 1 Fiat Bravo £6795 1 1.2 3000 1 Fiat Bravo £4995 2 1.4 18500 1 Fiat Punto £3769 4 1.1 38000 2 Ford Orion £7999 1 1.8 7000 1 Ford Escort £1595 7 1.3 68000 3 Ford Fiesta £1050 8 1.1 90000 2 Ford Fiesta £1495 11 1.8 74000 3 Ford Fiesta LX £1995 7 1.1 60000 2 Ford Escort Duet £2300 7 1.4 64000 3 Ford Escort £4295 3 1.4 29000 1 Ford Escort £4700 5 1.8 34000 1 Ford Fiesta £3200 4 1.8 27000 I Ford Focus £8800 2 1.6 7200 I Ford Puma £8250 3 1.4 34000 1 Ford Escort £3495 7 1.8 43000 2 Ford Mondeo £7995 4 2.0 30000 1 Ford Fiesta £1664 10 1.0 37000 3 Ford Escort £3995 5 1.8 57000 2 Ford Escort £2995 6 1.3 64000 2 Vauxhall Engine size Tally Frequency 1 0 1.2 | 1 1.4 |||| 4 1.6 |||| 4 1.8 | 1 2 | 1 2.2 0 2.4 0 2.6 || 2 To represent our data I will use frequency diagrams. Vauxhall Price (£) Tally Frequency 0 ? P> 1000 | 1 1000 ? P> 2000 | 1 2000 ? P> 3000 | 1 3000 ? P> 4000 || 2 4000 ? P> 5000 ||| 3 5000 ? P> 6000 0 6000 ? P> 7000 ||| 3 7000 ? P> 8000 || 2 8000 ? P> 9000 0 Ford Engine size Tally Frequency 1 | 1 1.2 || 2 1.4 ||||| 5 1.6 | 1 1.8 |||||| 6 2 | 1 2.2 0 2.4 0 2.6 0 Ford Price (£) Tally Frequency 0 ? P> 1000 0 1000 ? P> 2000 ||||| 5 2000 ? P> 3000 || 2 3000 ? P> 4000 ||| 3 4000 ? P> 5000 || 2 5000 ? P> 6000 0 6000 ? P...

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