Sorry, but these tests are no better than a palm reading Gypsy woman. In fact, they are the modern version of palm reading, astrology and similar sciences. One giveaway sign of trouble: the questions don't allow for ambiguity, or lack of opinion, or variation. I bet you that tomorrow, taking the very same test you'd come up with a different (if somewhat similar) score. I don't know, sometimes I do, it depends, is how we all are. Life ain't a mathematical equation.
This is the simplified, on-line test, so it is not as accurate as the full test. Myers-Briggs theory, while having its detractors, has proven to be pretty valid and useful over time.