[Closed,Open) Intervals in Statistics

It would be nice to change the way that SAMIGO shows the invervals for the statistics.

Now is using (Open,Closed] intervals, for example

(4,5] (All the scores between 4 and 5 and the scores equals to 5).
(5,6] (All the scores between 5 and 6 and the scores equals to 6).

Let´s say you must have a minimum score of 5 to pass the test. The (4,5] interval will have students passed and failed ( between 4 5 failed, = 5 passed)
Our instructors have suggested that is easier for them to have [Closed, Open) intervals so each interval won´t show failed and passed students at the same time.