What is the criteria that makes up a lead status?
I created a "Group by Status" report for one of my programs and it shows me a number of people for the following lead statuses:

So this is cool, but I'm not sure what the criteria is for a person to fall into one of these categories. My best guess is that a person falls into one of these statuses based off of their score, but in order for this to be meaningful information I need to know what the score is that needs to be met to reach each status.
Does anyone know where this is set up in Marketo? If it is preset by Marketo, I'm assuming there is a way to edit the score definition?
Thanks!