1. G10 Sustainable transport investigation
August/September 2017

4. To what extent is the transport system in Xianlin sustainable?

8. Sampling methods
Why sample?
Time constraints

9. Sample aims To be representative of the area being studied
To be free of bias

10. Random sample
Equal chance of being selected - no bias
But………..

11. Stratified random sample
Ensures a full coverage of the Xianlin area
Ensures no bias within each square

16. Pedestrian survey - Quota sample
Obtain sample quickly
Obtain the variety required
But………Bias

18. The written report