I have a question regarding an interpretation of the definition for the statistical term: mode
I teach 7th grade math. There has been some discussion within our dept. regarding the definition of mode. One of my colleagues and myself have always taught that the mode is that term that appears most frequently in a set of data. There can be more than one mode or no mode. If a set of data contains for example, 4,4,4,5,5,5, then there is no mode because there is no one term that appears more than the others. Yet one of our textbooks gives that example and lists both 4 and 5 as the modes. One of our colleagues who teaches from this particular book agrees that 4 and 5 both in the above example are modes. Who is correct? Please cite any references you may have.
Thank you.
Linda