D(X)叫做什么?( )
A.方差
B.协方差
C.相关系数
D.期望
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/270064.html
上一篇:Analyze and comment on the folowing.Read the extract, pick out the idioms and explain their meanings. Then rewrite the extract in standard non-figurative language.Sam is getting on, too. His hair is pepper and salt, but he knows how to make up
下一篇:待估宗地剩余使用年限为40年,可比交易案例剩余使用年限为45年,还原利率为10%, 则年限修正系数为