正态分布概念问题Which of the following is not true about the Normal

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正态分布概念问题
Which of the following is not true about the Normal Distribution?
以下说法哪一个是错的
It is completely described by its mean and its standard deviation.
正态分布完全由平均数和标准方差决定
Its median is equal to its mode.
中位数＝众数
The range of possible outcomes is finite.
区间内的可能值是无穷的
感觉都对啊.

正态分布一种概率分布,也称“常态分布”.正态分布具有两个参数μ和σ^2的连续型随机变量的分布,第一参数μ是服从正态分布的随机变量的均值,第二个参数σ^2是此随机变量的方差,所以正态分布记作N（μ,σ^2）.服从正态分布的随机变量的概率规律为取与μ邻近的值的概率大,而取离μ越远的值的概率越小；σ越小,分布越集中在μ附近,σ越大,分布越分散.

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