Statistics is the first subject that I learned about the specialized field in Mathematical Information Science. I remember the day I was struggling with the specialized field when I was a sophomore. It seems very easy to understand because it is related to our life; however, in fact, it turned out to be so hard when I try to understand the theory. The class of Multivariate Statistical Analysis reminds me of the hard time, and now I know that one field of Statistics, that is to say, Multivariate Statistical Analysis is not so easy. Then, why do I think so? I’m going to think about it from now on.
First of all, Multivariate Statistical Analysis is the specialized subject that we need to know the basic math. Unfortunately, I’m not good at linear algebra which would be the basic knowledge of this subject. In other words, I didn’t have enough assumption of that. The problem is that I don’t recognize the alphabet means either “a vector” or “a matrix” in short time, which might be related to this assumption. I’ve heard that human beings have decided the impression of the object in a few seconds when they see something. This doesn’t imply everything about Multivariate Statistical Analysis, but I think that I just happened to imagine the complicated thing when I first leaned this subject.
Secondly, there’re many ways of analysis. That is to say, there’re various kinds of the statistical data and the method for analysis (ex. Factorization, analysis for principal component and so on,) so it is very difficult to make a decision for the best way. In order to make the decision, I think that the amount of study is more important than the understanding of the theory of Multivariate Statistical Analysis.
Finally, I think that the great amount of calculation would be the reason. It is the general thinking that Multivariate Statistical Analysis needs the great amount of calculation, because this subject developed rapidly after the spread of computers. Because of the great amount of calculation, it is not easy to understand by using my hand and taking notes.
In conclusion, the thing I find Multivariate Statistical Analysis difficult is the lack of “experience” and practice. “Experience” means the process of knowing the characteristics of Multivariate Statistical Analysis and putting into my head. If I complete these two things, which would be great help to master this useful subject.