susan 發問時間: 社會與文化語言 · 1 0 年前

一題 GMAT-data sufficient -2

Q1: If each of the 8 employees working on a certain project received an award, was the amount of each award the same?

條件1:The standard deviation of the amount of the 8 award was 0.

條件2:The total amount of the 8 awards was $10,000.

答案是:條件一單獨成立。

為什麼條件1的標準差=0 能力呀???

請詳細解說謝謝!!

1 個解答

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  • 1 0 年前
    最佳解答

    Q1: If each of the 8 employees working on a certain project received an award, was the amount of each award the same?

    條件1:The standard deviation of the amount of the 8 award was 0.

    條件2:The total amount of the 8 awards was $10,000.

    條件1:The standard deviation of the amount of the 8 award was 0.

    獎勵金額的標準差為0,表示8個人所得到的獎勵都相同。因此可以回答原問題,yes!

    條件2:The total amount of the 8 awards was $10,000.

    8人所得到的獎勵金總和為1萬元,有可能每個人得到$1250,也有可能1個人得到$3000,其他7個人得到$1000……。只知道總和,各種分配的可能性有無限多種,因此無法回答原問題。

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