問題詳情

⑶已知廣告前的銷售量是 900,求其廣告後的平均銷售量是多少?(10 分)  (參考的 t 值: t30,0.05 =1.697, t29,0.05 =1.699, t15,0.05 =1.753, t14,0.05 =1.761)

參考答案

答案:B
難度:適中0.592857
統計:A(5),B(83),C(15),D(23),E(0)

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