normal-distribution

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--- normal-distribution [2024/03/14 17:14] – zzzz
+++ normal-distribution [2024/03/18 07:32] (当前版本) – fairytaleee
@@ 行 20: / 行 20: @@
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-=== 二、标准正态分布 ===
+=== 二、标准正态分布（Standard normal distribution） ===
 不同的正态分布可能有不同的均值和方差，这时画出的正态曲线也不相同。当标准差较大时，正态分布的形态更宽阔，而标准差较小时，正态分布的形状更高狭。
-而我们可以通过标准化，将横轴的原始分数用其相应的z分数代替，这样我们就得到了一个均值为0，标准差为1的正态分布，即标准正态分布。
+Different normal distributions may have different means and variances, and the normal curves drawn are also different. When the standard deviation is large, the shape of the normal distribution is broader, while when the standard deviation is small, the shape of the normal distribution is more narrow.
+而我们可以通过标准化，将横轴的原始分数用其相应的z分数代替，这样我们就得到了一个均值为0，标准差为1的正态分布，即标准正态分布。这并不会改变原始正态分布的形状。
+We can normalize and replace the raw fraction of the horizontal axis with its corresponding z-score, so that we get a normal distribution with a mean of 0 and a standard deviation of 1, that is, the standard normal distribution.This will not change the shape of the original distribution.
 对于标准正态分布，曲线下任一部分面积占总体面积的比率是固定的，例如，介于均值到一倍标准差之间的区域所占比率是34.13%，介于均值到两倍标准差之间的区域所占比率是47.72%，介于均值到三倍标准差之间的区域所占比率是47.72%。
+For the standard normal distribution, the ratio of any part of the area under the curve to the total area is fixed, e.g., 34.13% for the region between the mean and one standard deviation, 47.72% for the area between the mean and two standard deviations, and 47.72% for the area between the mean and three standard deviations.

normal-distribution.1710436474.txt.gz · 最后更改: 2024/03/14 17:14 由 zzzz