原点矩是指变量所有取值( )的算术平均数。
A.某次方
B.平方
C.二次方
D.两倍
正确答案是A
扫描二维码免费使用微信小程序搜题/刷题/查看解析。
版权声明:本文由翰林刷题小程序授权发布,如需转载请注明出处。
本文链接:https://doc.20230611.cn/post/202029.html
上一篇:Directions: In this section of the test, there are ten paragraphs. Each of the paragraphs is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Spell out the missing letters of the word on your Answer Sheet.
下一篇:一个人在群体中工作不如单独一个人工作时更努力,这种现象是