heteroskedasticity 词源是什么
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Rapunzel" is a fairy tale in the collection assembled by the Brothers Grimm, and first published in 1812 as part of Children's and Household Tales. It is one of the best known of fairy tales, and its plot has been used and parodied by many cartoonists and comedians, its best known line ("Rapunzel, Rapunzel, let down your hair") having entered popular culture. Rapunzel \u7531Brothers Grimm\u6536\u96c6\u7684\u795e\u8bdd\u6545\u4e8b\uff0c\u4f5c\u4e3a\u300a\u5987\u5e7c\u4f20\u8bf4\u300b\uff08\u4e00\u672c\u4e66\u540d\uff0c\u4e0d\u592a\u6e05\u695a\u5177\u4f53\u600e\u4e48\u8bd1\uff01\uff09\u7684\u4e00\u7ae0\u8282\u51fa\u7248\u4e8e1812\u5e74\u3002\u5b83\u4e5f\u662f\u6700\u8457\u540d\u7684\u795e\u8bdd\u6545\u4e8b\u4e4b\u4e00\uff0c\u5176\u60c5\u8282\u88ab\u8bb8\u591a\u5361\u901a\u7247\u548c\u559c\u5267\u5f15\u7528\u6a21\u4eff\uff0c\u5e76\u4e14\u5176\u53f0\u8bcd\u201cRapunzel,Rapunzel,let down your hair\u201d\u5df2\u8f6c\u53d8\u4e3a\u4e00\u79cd\u6d41\u884c\u6587\u5316\u3002
词根是 skedasticity ：离中趋势前缀是 hetero：n. 异性恋的,非同性恋[爱]的 adj. 异性恋[爱]者 ；不规则变化
合成在一起就是：不规则变化的离中趋势，也就是异方差
hetero是“相异”的意思，比如heterosexual其他的就不知道了。
heterozygous.
这个主要是源于人的细胞的词汇，但现在也可以用来解释人的个性之类的。
variance它不仅有方差的意思还有差额名词变动的意思。heteroskedasticity 应该是地方差异
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