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10. ให้ \( Z \) เป็นตัวแปรสุ่มปกติมาตรฐาน จงหา \( P(-1.78
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Mar 18,2025

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\( P(-1.78 < Z \leq 2.41) = 0.9545 \)

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ในการหาค่า \( P(-1.78 < Z \leq 2.41) \) สำหรับตัวแปรสุ่มปกติมาตรฐาน \( Z \) เราสามารถใช้ตาราง Z หรือฟังก์ชันการแจกแจงปกติของ Python หรือเครื่องคิดเลขเพื่อหาค่าดังนี้: 1. ค้นหาค่าของ \( P(Z \leq 2.41) \) และ \( P(Z \leq -1.78) \) - \( P(Z \leq 2.41) \) ประมาณ 0.9920 - \( P(Z \leq -1.78) \) ประมาณ 0.0375 2. คำนวณ \( P(-1.78 < Z \leq 2.41) = P(Z \leq 2.41) - P(Z \leq -1.78) \) - \( P(-1.78 < Z \leq 2.41) = 0.9920 - 0.0375 = 0.9545 \) ดังนั้นคำตอบที่ถูกต้องคือ ตัวเลือกที่ 3: \( 0.9545 \)

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