descriptive_statistics_and_inferential_statistics

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--- descriptive_statistics_and_inferential_statistics [2024/03/01 05:52] – 2104龚文滕
+++ descriptive_statistics_and_inferential_statistics [2024/03/03 02:56] (当前版本) – 2104龚文滕
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   *定义：描述统计是指用来整理、概括、简化数据的统计方法，侧重于描述一组数据的**全貌**，刻画一件事物的性质。
   *常用的描述统计有求**平均值**、**标准差**等。
-  *描述统计常利用图、表的方式来表示
+  *描述统计常利用**图、表**的方式来表示。
   *Definition: Descriptive statistics refers to statistical methods used to organize, summarize, and simplify data,focusing on **describing the overall picture of a set of data** and characterizing the properties of something.
   *Common descriptive statistics methods include calculating **mean** and **standard deviation**.
-  *Descriptive statistics often use **graphs and tables** to dscribe statistics
+  *Descriptive statistics often use **graphs and tables** to dscribe statistics.
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   *定义：推论统计是指用一系列数学方法，将从**样本数据**中获得的结果推广到样本所在的总体。
   *由于现实条件的限制，实际研究中可能无法逐一考察总体中的每一个个体，只能利用有**代表性**的样本来推测总体的情况。
+  *进行推论统计的关键在于所抽取的样本要能够**尽量接近所要研究的总体**，使得产生的**取样误差**最小。
+  *Definition: Inferential statistics refers to the use of a series of mathematical methods to generalize the **results obtained from sample data** to the population where the sample is located.
+  *Due to limitations in practical conditions, it may not be possible to examine each individual in the population one by one in actual research, only **representative samples** can be used to infer the overall situation of the population.
+  *The key to conducting inferential statistics is to extract samples that are **as close as possible to the population** being studied, in order to minimize the **sampling error**.

descriptive_statistics_and_inferential_statistics.1709272353.txt.gz · 最后更改: 2024/03/01 05:52 由 2104龚文滕