ABSTRACT
Efficient sampling design starts with defining a target population properly. Reverting to the above example, perhaps it is too ambitious to target the entire population of China. However, focusing on Chinese business travellers seems more realistic. Since it is not practical to approach every Chinese business traveller for this study, the second step is to define an accessible population. The accessible population is a subset of the target population that reflects specific characteristics of the target population and is accessible for study.
