NO.PZ2018101001000003
问题如下:
Natasha does the regression analysis to analyze the relationship between X and Y, and gets the following information about regression statistics.
Given the slope coefficient is -0.913, the correlation between X and Y is:
选项:
A.0.4534
B.0.6734
C.-0.6734
解释:
C is correct.
考点: Coefficient of Determination.
解析:在一元线性回归中,X和Y的相关系数的绝对值等于Multiple R。当slope coefficient( ) 大于0时,相关系数大于0 ; 当slope coefficient( ) 小于0时,相关系数小于0。由题干可知,本题的slope coefficient是小于0的,所以X和Y的相关系数是个负数。已知Multiple R为0.6734,所以X和Y的相关系数为-0.6734,选择C选项。
slope coefficient和mutiple R有关系吗 都表示多少的y