A Major study was conducted by the NSSE (National Study of Student Engagement), to find the most and least demanding majors. 416,000 full-time first-year students and seniors attending 673 colleges and universities were surveyed, during 2011. And here are the results!
Physical Sciences. This major requires an average of 18 hours of study and preparations for class per week.
Arts and Humanities. Craving some creativity, than may be this is the major for you. Although not as demanding as the above majors, this major still requires above average study time.