It's more likely that you're an ENTP as they are more mentally flexible and are more prone to variance in testing.
The question is, do you define? If the answer is a high percentage for yes then perhaps you buck the trend and are an INTP.
That's irrelevant. Introversion and Extroversion are a mental and physical preference for people or not.
@Theuniquezebra, how 'bout this:
1. Go hang out with alot of friends from 5-9 every day a week for a week. How do you feel after that?
2. After that, go do something private without any social contact at all for a week. How do you feel?
If 1. makes you feel energized and 2. makes you feel drained, you're an Extrovert.
If 1. makes you feel drained and 2. makes you feel energized, you're an Introvert.
If they are both draining, but not totally, then you're an Ambivert.
"Only two things are infinite. The universe, and human stupidity, but I'm not sure about the former." -Albert Einstein "You know you're in love when you can't fall asleep because reality is finally better than your dreams." -Dr. Seuss "If you want to know what a man is like, take a good look at how he treats his inferiors, not his equals." -J. K. Rowling