随机变量X~π(5),则其方差为( )
B.2.5
C.5
D.25
正确答案是C
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/201829.html
上一篇:Passage 1When the European Community's vast single market officially takes effect on Jan.1, there will be no balloons and brass bands, and holiday fliers between EC cities will still face passport checks at airports. Europeans will wake up on New
下一篇:Translate the following sentences into English, each using one of the given words or phrases below in its proper form.doom expose reinforce after all draw on这种液体不可暴露在空气中,因为它会很快蒸发掉