You're comparing medians to means. The means are much lower due to the average being skewed upwards by the wealthy.
Edit: the averages are much higher than the median of course
Edit: the averages are much higher than the median of course
Edit: Actually, it's pretty similar with medians (via Python now).
The bottom 10 are: Drama/Theatre Arts and Stagecraft, Library and Archives Assisting, Movement and Mind-Body Therapies and Education, Dance, Alternative and Complementary Medicine and Medical Systems, Theological and Ministerial Studies, Film/Video and Photographic Arts, Personal and Culinary Services, Other, Music, Mason/Masonry
The top 10 are: Advanced/Graduate Dentistry and Oral Sciences, Nuclear Engineering Technologies/Technicians, Biomathematics, Bioinformatics, and Computational Biology, Operations Research, Personal Awareness and Self-Improvement, Naval Architecture and Marine Engineering, Marine Transportation, Systems Engineering, Mining and Mineral Engineering, Computer Engineering.
Like sure, a professional degree in dentistry probably does have a better average return than a 4 year degree in engineering, but that isn't the comparison they made.