The study of statistics: the discipline of collecting, organizing, analyzing, and interpreting data, including probability and inferential methods.
大学で統計学を専攻している友人がいる。
I have a friend who majors in statistics at university.
実験データは統計学の手法を使って解析したほうが信頼性が高い。
It's more reliable to analyze experimental data using statistical methods.
平均や分散は統計学の基本的な概念だ。
Mean and variance are fundamental concepts in statistics.