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Z Score的定义

Z Score的定义,大家帮忙看看为什么正确答案不是选B?而是选D?
 
 
 
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This is a good question, the B could be right, but D is better. Since you do not need the appropriate table to know the B, but you do need the table (or Minitab) to know D

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Hi David

I have a question need your kindly help:

I am wondering if the right answer was B, why right answer is D?

30. The formula Z = (X - µ)// is used to calculate a Z score that, with the appropriate table, can tell a Green Belt what the

A. Ratio is the area under the curve relative to the total population
B. Number of standard deviations are between X and µ
C. Median of the sample population is
D. Proportion of the data is between X and µ
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此题的意思为:场景是拿着标准正态分布函数表,已知Z Score(Z得分,即:Z值),按照此值(表头),找到对应的Proportion(面积)数值。
选项B没拿表前是对的,但拿了有查就应该得到probability(概率),答案D。
否则,光找了表头不查内容…这题,妥妥的急转弯,出题的是不是脑子都这样,不分中外,啊啊啊。
整整快1年了,最近才看的这表(以前从来不查表),今天才突然意识到。

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jacd
jacd

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