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欲溺之鱼 · 2024年06月25日

没找到答案中显示的能表示标准化的题干句子

  1. CFA II
  2. Quantitative

* 问题详情，请 查看题干

NO.PZ202208300200000604

问题如下：

The method of scaling that Khan will use on Dataset 1 is most likely:

选项：

A.winsorization. B.normalization. C.standardization.

解释：

Solution

C is correct. Standardization is the process of both centering and scaling the variables. In this case, each temperature value will be standardized against the historical mean temperature for the geographic area. Standardization requires that the data be normally distributed, and the resulting standardized variable will have an arithmetic mean of 0 and a standard deviation of 1.

A is incorrect. Winsorization is a process of handling outliers that replaces extreme values and outliers with the maximum (for large-value outliers) and minimum (for small-value outliers) values of data points that are not outliers.

B is incorrect. Normalization is the process of rescaling numeric values in the rage of [0, 1], which is not the case for determining variation against historical temperature. Normalization can be used when the distribution of data is not known but treatment of outliers is necessary.

没找到答案中显示的能表示标准化的题干句子

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1 个答案

品职助教_七七 · 2024年06月26日

嗨，爱思考的PZer你好：


题干最后一段给出：

“Next, Khan reviews the historical temperature data, which he assumes are normally distributed at the local zone level, and begins scaling the data to determine variation against the mean temperature in each zone.”

标黑的：1）正态分布；与2）和mean作对比，都是应使用standardization的暗示。


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2024-04-21 09:12 1 · 回答