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Some key concepts and terms, widely used in the literature on the topic of probability distributions, are listed below.<ref name=":02" />

Some key concepts and terms, widely used in the literature on the topic of probability distributions, are listed below.<ref name=":02" />

Some key concepts and terms, widely used in the literature on the topic of probability distributions, are listed below. the regions close to the bounds of the random variable, if the pmf or pdf are relatively low therein. Usually has the form X > a, X < b or a union thereof.

Some key concepts and terms, widely used in the literature on the topic of probability distributions, are listed below.  

一些关键的，广泛用于以概率分布为主题的文献中的概念和术语，列出如下。

一些关键的，广泛用于以概率分布为主题的文献中的概念和术语，列出如下。

*'''[[Frequency distribution]]''': a table that displays the frequency of various outcomes '''in a sample'''.

*'''[[Frequency distribution]]''': a table that displays the frequency of various outcomes '''in a sample'''.

'''<font color="#ff8000"> 频率分布 Frequency Distribution</font>'''：显示样本中各种结果的频率的表格。

'''<font color="#ff8000"> 频率分布 Frequency Distribution</font>'''：显示样本中各种结果的频率的表格。

*'''Relative frequency distribution''': a [[frequency distribution]] where each value has been divided (normalized) by a number of outcomes in a [[Sample (statistics)|sample]] i.e. sample size.

*'''Relative frequency distribution''': a [[frequency distribution]] where each value has been divided (normalized) by a number of outcomes in a [[Sample (statistics)|sample]] i.e. sample size.

*'''[[Kurtosis]]''': a measure of the "fatness" of the tails of a pmf or pdf. The fourth standardized moment of the distribution.

*'''[[Kurtosis]]''': a measure of the "fatness" of the tails of a pmf or pdf. The fourth standardized moment of the distribution.

峰度：pmf或pdf尾部“脂肪”的量度。分布的第四个标准化时刻。

峰度：pmf或pdf尾部“脂肪”的量度。分布的第四个标准化时刻。

=='''<font color="#ff8000"> Discrete probability distribution 离散概率分布</font>'''==

=='''<font color="#ff8000"> Discrete probability distribution 离散概率分布</font>'''==