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Crystal2022-05-05 11:09:20
Kurtosis represents the 3rd moment of a distribution. A small kurtosis indicates flatness in the middle of the distribution. A population with low kurtosis is usually called leptokurtic. Skewness (and not kurtosis) plays an important role in distinguishing those distributions that place additional probability on larger values.
b选项没有一句是对的,首先他说风度代表的是三阶矩,衡量分布偏离均值的程度。峰度低叫做尖峰,这些都是不对的。
Kurtosis can be verified in the four initial moments of a distribution and measures the mean of a distribution.
c选项峰度是四阶矩这句话是没有问题的,但是他不是衡量分布的均值。
Kurtosis can be seen in the second and fourth moments of a distribution and measures the standard deviation of a distribution.
d选项峰度只能在分布中的四阶矩看到测量的也不是标准差。
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