Imagine after grading this exam I look at the distribution of test scores in this class and conclude there is a group of students for whom the material was very difficult and another group of students for whom the material was very easy. Which of the following would MOST likely lead to this conclusion?
A) The distribution is bimodal.
B) The standard deviation is very small.
C) The mean was higher than I expected.
D) The distribution is peaked.

Question

Quizplus · Accepted Answer

A bimodal distribution indicates two distinct groups of scores, which could suggest that some students found the material easy while others found it difficult. The other options do not necessarily indicate a clear separation between two groups of scores.

Imagine After Grading This Exam I Look at the Distribution