• 2022-05-26
    设随机变量[img=18x21]17d608a06a37446.png[/img]与[img=19x23]17d608a079ad008.png[/img]的相关系数为0.9,若[img=100x22]17d608a086ec934.png[/img],则[img=19x23]17d608a079ad008.png[/img]与[img=18x20]17d608a09874bc8.png[/img]的相关系数为()
    A: 0.81
    B: 0.5
    C: 0.4
    D: 0.9