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.

A masters is earned after students complete an undergraduate degree program. To obtain a masters, you usually need to complete 12 to 18 college courses that often involve completing comprehensive tests and/or a thesis.