The bar graph shown displays the results of a test on which each student earned a score of 70, 80, 90, or $100, and the number above each bar indicates how many students earned that test score. What is the absolute difference between the median and the mean of the students' scores? Express your answer as a decimal to the nearest tenth.

The bar graph shown displays the results of a test on which each student earned a score of 70 80 90 or 100 and the number above each bar indicates how many stud class=