After grading an examination, an instructor realizes the exam was much harder than she planned. She reaches this conclusion because the shape of the distribution of exam scores is ______.
A) bimodal
B) flat
C) skewed
D) normal

Question

Quizplus · Accepted Answer

A skewed distribution has a tail that stretches out to one side, indicating that there are some scores that are extremely high or low compared to the rest. This suggests that the exam was more difficult than expected, and some students struggled to perform. A normal distribution would indicate that the exam was fair, while bimodal or flat distribution would suggest other issues, such as cheating or poorly written questions.

After Grading an Examination, an Instructor Realizes the Exam Was