目下のところ、「統計学」を学び直しています。
最初に統計学を学んだのは大学時代でしたが、内容はほとんど覚えていません。一夜漬け勉強で対応したのでしょう。
次に統計学を学んだのは、ビジネススクール（MBA）です。基本的に表計算ソフト（Excel）の利用を前提としたビジネス目的の科目でした。
MBAで最初の頃に扱う内容については、ある程度の素養があったので、統計学やファイナンス理論の基礎となっている数学を基礎から学ぼうと考えました。
私自身は文系出身なので、大学数学については知らないことも多かったですし、高校時代の数学もかなり忘れていました。
そこで、数学（大学学部生用）の教科書を購入して勉強することにしました。教科書は1000ページを超える厚いものでしたが、高校数学の復習から始まっており、非常に読みやすかった印象があります。
[English]
Recently, I’ve been re-learning statistics.
The first time I encountered statistics was decades ago, during my university days. I recall struggling through difficult textbooks, cramming for exams in a couple of days.
My second encounter was during my time at business school. My MBA curriculum included a course on “Business Statistics,” which covered the fundamentals of statistics. However, the emphasis was primarily on utilizing spreadsheet software (such as Excel) for analysis. Consequently, this subject didn’t cover the theoretical aspects.
Thanks to my prior exposure to some of the MBA course topics and my working experience in a consulting firm, some of the subjects were relatively familiar to me.
Thus, I decided to delve into more advanced areas, such as the mathematical foundations underlying statistical or financial theory.
However, I lacked a solid foundation in mathematical concepts typically covered at the university level. To address this gap, I visited the university bookstore and purchased a thick textbook designed for undergraduate mathematics students.
Despite its intimidating size of over 1000 pages, the book started with the basics of high school mathematics and was very readable to me.
By revisiting statistics and finance from its mathematical foundations, I was able to gain a deeper understanding of subjects that are rooted in mathematics.
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