Doesn't matter if you switch or not (unless you picked the door the host opened). You're left with three doors and you have an equal opportunity to win the SUV with any of them. So I would say you have 33.3333333(infinity)% chance of winning whether you switch or not.
I'm also not known as a math wiz so maybe someone can tell me if I'm right or wrong.
Several studies have investigated the relationship between intelligence and the degree of religious belief (excluding humanism), with most showing an inverse correlation between intelligence averages and the "importance of religion" to the testee.