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The 2-Minute Rule for ซื้อของกับ kaieverything
rufush667mgb0
4 days ago
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ยกเลิกเมื่อไรก็ได้ ปรับแต่งได้สะดวก 単純無作為抽出法は、特に母集団が均質で、リストアップ可能な調査対象がある場合に適しています。たとえば、従業員満足度調査や、大学内での学生アンケート、製品購入後の顧客フォローアップなどが該当します。これらは母集団の情報が事前に揃っているため、等確率でサンプルを抽出するのが容易です。また、臨床試験などの医療研究でも、対象者を無作為にグループ分けする際に...
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