histogram
The histogram above corresponds to the scores of the first midterm.
The second row of the table correspoond th the scores. For instance if you scored between 76 and 82,  your letter grades is A-.
The third row is the percentage of students in each grade range. For example, 9% of the students got A-.
The mean was 54.2 and the median 57.
The standard deviation was 21.

If you scored less than 31,  you'll must change how you approach the material if you hope to pass the class.