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.

The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom and Britain, is a sovereign state located off the northwestern coast of continental Europe. The two most famous (and oldest) universities are Oxford and Cambridge (often referred to as Oxbridge by many Britons). England also has several other world-class institutions, including several in London (notably Imperial College, the London School of Economics, University College London and King's College London, all are part of London University).

A student who achieves high scores on A-levels may have more options when it comes to choosing an advanced degree program. A-level exam scores are often a major factor in gaining enrollment in a respected university.