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Johnny.C · 2023年05月14日

是用normalization计算,为什么分子是用不用1.1-0.2

* 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



我理解这个公式,不应该是1.1-0.2】/12.2-0.2,不是这样么

1 个答案

星星_品职助教 · 2023年05月15日

同学你好,

Xi是ID 3中interest expense的值,对应表格得到1.2。而不代表mean的值。

换而言之,假设本题要计算的是ID2,那么此时分子就是0.4-0.2