What is the meaning of the standard deviation when it is negative是什么意思顺便用英语做一下吧

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Whatisthemeaningofthestandarddeviationwhenitisnegative是什么意思顺便用英语做一下吧Whatisthemeaningofthestandarddev

What is the meaning of the standard deviation when it is negative是什么意思顺便用英语做一下吧
What is the meaning of the standard deviation when it is negative是什么意思
顺便用英语做一下吧

What is the meaning of the standard deviation when it is negative是什么意思顺便用英语做一下吧
标准差为负值时是什么意思