Mrs. Allen is comparing the grades of her math students in two classes. Each dot represents a student. Which statement correctly compares the data? A. Although the mean of the grades of class A is greater than the mean of the grades of class B, the variability creates too much overlap for any conclusion to be made.
B.
Class A generally has the exact same grades as class B.
C.
Class B generally has better grades than class A.
D.
Class A generally has better grades than class B.
It is not possible to determine the correct answer without seeing the graph or having more information about the distribution of grades in each class.
The correct statement that compares the data is:
A. Although the mean of the grades of class A is greater than the mean of the grades of class B, the variability creates too much overlap for any conclusion to be made.