<https://business-textbooks.com/quantitative-qualitative/>
<http://schema.org/description>
"定量（定量的・定量評価・定量調査）と定性（定性的・定性評価・定性調査）の違いとは 定量とは（定量的・定量評価・定量調査）"
<https://business-textbooks.com/quantitative-qualitative/>