Each of the dot plots shown represents the number of books read by students in two book clubs, Club A and Club B. Which statement best compares the means of the numbers of books read by each student for these two clubs?

The mean number of books read for Club A is less than the mean number of books read for Club B.
The mean number of books read for Club A is equal to the mean number of books read for Club B.
The mean number of books read for Club A is greater than the mean number of books read for Club B.
There is not enough information to compare these means.