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
0.083
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
