How do researchers determine what is true based on the data they collect? This question is one of the central concerns of statistics, which uses mathematical models to draw useful conclusions about the real world.

Due to the numerous countries within Oceania, work occasions and work permit laws differ greatly, with data on opportunities in some nations being limited. Australia and New Zealand are the most advanced countries in the area.

Should an individual decide to gain additional certification that they are qualified in a field of study, they may decide to gain a postgraduate diploma. This type of diploma is attained after one has first completed a master's degree.