Mary Hall is a editor for Investopedia's Advisor Insights, in addition to being the editor of several books and doctoral papers. Mary received her bachelor's in English from Kent State University with ...
Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...
5. 集落サンプリング(コストを最小化) 母集団をグループに分け、ランダムに選んだ 特定のグループ全員 を調査する方法です。 • イメージ: 60クラスから3クラスをランダムに選び、そのクラスの生徒全員を調査する。