Probabilities, t-tests and z-scores

I've just finished exam for the statistics class that I took over the summer semester. In in we learnt about some of the statistical tests that can be run on data to find whether it it significant or not. My preparation for the exam involved going over and over the practice exam that we were given performing the same questions over and over again until they sank in. The test itself was challenging. Most of the other people that I've spoken to about it feel the same. The test had questions on t-tests, z-scores, chi quared, binomial probabilities and distribution curves. By the end of the two hour exam, only two people had left the auditorium after finishing the exam. For me, it was the first exam that I have had to write from start to finish. Now I've just got to wait for the results which should come out in a couple of weeks. Fingers crossed!