A study of grades at a large university finds that the mean GPA for all undergraduates is 2.77. The distribution of grades is roughly normal. To make this description useful we must also know
A) the correlation.
B) the median.
C) the slope.
D) the standard deviation.

Question

Quizplus · Accepted Answer

In order to fully describe the distribution of grades, we need to know the standard deviation. This will give us an idea of how much variation there is in the grades, which is important for understanding the overall performance of students at the university. The correlation, median, and slope are not relevant for describing the distribution of grades.

A Study of Grades at a Large University Finds That