题目
What is the correlation between X & Y?「huixue_img/importSubject/1564169388796547072.jpeg」
选项
A.0.6330
B.0.7044
C.0.8175
D.0.9286
答案
D
解析
As Covariance(X,Y)= 0.0520%,σX=2.8%,σY = 2.0%, correlation =0.0520%/(2.8%×2.0%) = 0.9286. 本题解析如下： Covariance(X,Y)= 0.0520%,σX=2.8%,σY = 2.0% Correlation =0.0520%/(2.8%×2.0%) = 0.9286.