Statistics

The last time I took Statistics was freshmen year of college which seems like it was a really long time ago. There are a lot of things I vaguely remember from the class but most of the things I remember are due to the fact that they still play a major role in classes that I have taken that are science related. Such as in classes involving genetics chi square problems can be super popular in order to help identify whether or not a hypothesis can be rejected. For chi square problems I know we get an observed value that is given to us and an expected value is one that we must find on our own. We do observed minus expected and square that value and divide it by the expected in order to come to a value. We do this for every observed value and add up all of these values we compare the number that we get to the number given to us by the degrees of freedom and that tells us whether or not we can accept a hypothesis. In physics classes that I have taken in college we have discussed standard deviation which is something that comes up in statistics. I also vaguely remember t-tests and the graph that has to do with confidence and p-values. Also I remember having to figure out the probability of something happening a different number of times with different combinations.