Final answer:
The distribution of exam scores is likely left-skewed, indicating most students scored high and found the exam easy.
Step-by-step explanation:
If the students in a psychology class found the midterm exam to be very easy, the most likely shape for the distribution of exam scores is left-skewed or negatively skewed. This implies that a larger number of students scored high marks, creating a tail on the lower end of the distribution. Therefore, few students would have lower scores, and the bulk of the class would have higher scores, suggesting that the exam was not very challenging for most students.