The above poster is correct. Your legal residence is based on: (1) where you own/rent property, (2) where you are registered to vote, (3) where your car is titled, and (4) where you pay taxes.
Most college students don't change their legal residence. In that case, your MOC doesn't change. If your parents claim you as a dependent on their taxes, chances are that your legal residence is where your parents reside.
IF you happen to attend college in ND, SD, WY, etc., it may make sense to establish residency there. However, there can be tax and other consequences to you and/or your parents if you do so. Thus, consider carefully if you can do it and, overall, if it is wise.