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.

Individuals who are interested in pursuing highly skilled careers may want to start by earning an associate degree at a community college or university. As students earn their degrees, they often expand their knowledge and worldview, as well as increase their professional qualifications.