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.

Spanning many countries and island territories, South America is home to many Spanish-speaking countries. Here, students can literally walk through history on their way to class and soak up the culture of ancient societies.

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.