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• 【題組】(4)資料是否顯示Y可提供預測X時之情報？試以a=0.05檢定之.（4分）
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• 【題組】19. 10％的NaCl 200g和20％的NaCl 300g混合，則混和後的濃度為多少?(A)16 (B)14 (C)8 (D)7
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