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齐王木木 · 2021年02月17日

如何通过题干联想到normalization？

  1. CFA II
  2. Quantitative

* 问题详情，请 查看题干

NO.PZ201512020300000606

问题如下：

Based on Exhibit 1, for the firm with ID #3, Steele should compute the scaled value for the “Interest Expense” variable as:

选项：

A.

0.008

B.

0.083

C.

0.250

解释：

B is correct. Steele uses normalization to scale the financial data. Normalization is the process of rescaling numeric variables in the range of [0, 1]. To normalize variable X, the minimum value (Xmin) is subtracted from each observation
(Xi), and then this value is divided by the difference between the maximum and minimum values of X (Xmax – Xmin) :The firm with ID #3 has an interest expense of 1.2. So, its normalized value is calculated as Xi (normalized) = 0.083



老师，怎么就通过此题问题联系到normalization？

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1 个答案

星星_品职助教 · 2021年02月17日

同学你好，

找到这道题在题干中的位置：“After applying these transformations, Steele scales the financial data using NORMALIZATION. She notes that over the full sample dataset, the“Interest Expense” variable ranges from a minimum of 0.2 and a maximum of 12.2, with a mean of 1.1 and a standard deviation of 0.4.”

所以可以看出，Steele用来处理金融数据的方法是normalization（Steele scales the financial data using NORMALIZATION），然后根据题干给出的“a minimum of 0.2 and a maximum of 12.2”和ID 3中的1.2，代入normalization的公式计算即可。

Xi(normalized) =(1.2-0.2)/(12.2-0.2)=0.083

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NO.PZ201512020300000606 问题如下 Baseon Exhibit 1, for the firm with I#3, Steele shoulcompute the scalevalue for the “Interest Expense” variable as: A.0.008 B.0.083 C.0.250 B is correct. Steele uses normalization to scale the financitNormalization is the process of rescaling numeric variables in the range of [0, 1]. To normalize variable X, the minimum value (Xmin) is subtractefrom eaobservation(Xi), anthen this value is vithe fferenbetween the maximum anminimum values of X (Xm– Xmin) :The firm with I#3 hinterest expense of 1.2. So, its normalizevalue is calculateXi (normalize =0.083 我的计算理解是将4家公司的利息成本数据进行计算，请老师指正错误分子1.2减0.4；分母1.5减0.4，

2023-12-08 19:33 1 · 回答

NO.PZ201512020300000606 问题如下 Baseon Exhibit 1, for the firm with I#3, Steele shoulcompute the scalevalue for the “Interest Expense” variable as: A.0.008 B.0.083 C.0.250 B is correct. Steele uses normalization to scale the financitNormalization is the process of rescaling numeric variables in the range of [0, 1]. To normalize variable X, the minimum value (Xmin) is subtractefrom eaobservation(Xi), anthen this value is vithe fferenbetween the maximum anminimum values of X (Xm– Xmin) :The firm with I#3 hinterest expense of 1.2. So, its normalizevalue is calculateXi (normalize =0.083 我理解这个公式，不应该是1.1-0.2】/12.2-0.2，不是这样么

2023-05-14 01:10 1 · 回答

NO.PZ201512020300000606 老师，这里也可以算stanrzation，1.2-0.2/4，为什么要用normailization？

2021-04-25 19:56 1 · 回答

老师问下 这道题不是（1.2-0.4）/（12.2-0.2）=0.8吗 0.833怎么算的呀

2021-01-05 12:52 1 · 回答