Large data set

What are the general reasons why a conclusion would be invalid

Not all cars → only 5 makes of the car in the data set

Not all regions → only 3 regions in the UK included

Not all years → only cars registered in 2002 and 2016

Not all emissions → Some values for emissions are missing

Note for CO2

Known for 4/5ths of the database

Not for CO emissions

Known for 4/5ths of database

Note for NOX emissions

Known for 4/5ths of cards in the database

What 3 regions can registered keepers be from

London, South West or North West

List the keeper IDs and what they correspond to

1 - Male

2 - Female

3 - not used

4 - Unknown(Dr, Rev)

5 - Company

What are all the emissions measured?

g/km

Note for mass

Includes an addition 75kg for the mass of an average driver

What are all the different propulsion types

Petrie, Diesel, Electric, Gas/Petrol, Electric/Petrol

Note for propulsion types

Only 1 gas/petrol and only 1 electric in the whole database

Particulate emissions note

Only for diesel vehicles 1/4th of whole database

Note for hydrocarbon emissions

Known for half the database

In the database Which year has a larger sample of cars

2016