To get that answer for sure I'd recommend asking the staff. But, generally you are graded based on who is in the class with you. Some schools mix their part times with full times, many do seperate schedules to try to be more fair. You appear to be in the latter grouping.
In theory a school could still have a curve based on the both combined, but I doubt they would. Both groups would cry foul, each thinking the other had an unfair advantage. (one due to less classes, and the other due to life obligations that full timers tend to just don't have)