【单选题】Why is the student interested in learning more about dialects?
A.
She often has trouble understanding what other students are saying.
B.
She is trying to change the way she speaks.
C.
She is aware that her own dialect differs from those of her roommates.
D.
She spent her childhood in various places where different dialects are spoken.
【多选题】在利用回归模型进行预测时,需要对回归系数、回归方程进行检验,以判定预测模型的合理性和适用性。检验方法有方差分析、相关检验、t检验等。以下说法正确的是 ______。
E.
在一般情况下,需同时进行方差分析、相关检验、t检验
【多选题】反映某一元线性回归方程 y=a+bx 好坏的指标有()
【多选题】一元线性回归方程 y=a+bx ,其判定系数为 0.64 ,则 x 与 y 的相关系数可以是()
【单选题】What has MIT Professor Ariely discovered?
A.
People tend to behave irrationally in a predictable fashion.
B.
People should act according to logic and reason required in a situation.
C.
It causes problems to themselves as well as to others.
D.
He doesn't think this irrational behavior is always intentional.
E.
If a person knows someone suffers from a disease, he will feel he suffers from the same disease.
【多选题】反映某一元线性回归方程好坏的指标有( )。 A.相关系数 B.判定系数 C.b的大小 D.估计标准误 E.其他
A.
反映某一元线性回归方程y=a+bx好坏的指标有( )。 A.相关系数
【多选题】【预算】企业预算最主要的两大特征是( )。