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判断题 设X,Y的方差为D(X)=2,D(Y)=3,且D(X-Y)=5,则X,Y一定不相关 ( )
学科：默认课程
时间：2025-11-21 02:08:15
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相关作业
题目1判断题
X与Y不相关的充要条件是D(X+Y)=D(X)+D(Y).( )A. 正确B. 错误
题目2判断题
设X,Y的方差为D(X)=2,D(Y)=3,且D(X-Y)=5,则X,Y一定不相关 ( )A. 正确B. 错误
题目3判断题
<img src="https://tihai-oss-cloud.itihey.com/img/c64e6a7bdbfc06fcb86659ac8d689f23.png">A. 正确B. 错误
题目4判断题
<img src="https://tihai-oss-cloud.itihey.com/img/a9c7dbba72641c66095395a2fe2971dd.png">A. 正确B. 错误
题目5判断题
<img src="https://tihai-oss-cloud.itihey.com/img/579721e82708039b97070d26adf3878d.png">A. 正确B. 错误
题目6单选题
<img src="https://tihai-oss-cloud.itihey.com/img/4d9383434389b87dad5ab2186bc31423.png">A. 相关且不独立B. 不相关且独立C. 不相关且不独立D. 相关且相互独立
题目7单选题
<img src="https://tihai-oss-cloud.itihey.com/img/008269b820f0c92ddb0daf18122a0b39.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/fdc9106fd10778cb2b220fe75339c36e.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/96ee3939a0a92e755c0c62372c37827a.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/76fbe334d1970e2dea276ce3b93daa24.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/c9677fdb46fd65ad755917c0a6e8cab8.png">
题目8单选题
<img src="https://tihai-oss-cloud.itihey.com/img/50e6a25debaed127240fbbd7f9f9b53b.png">A. <img src="https://tihai-oss-cloud.itihey.com/img/3e38ddd86d26baafb4ac3e5aa4c1f9c4.png">B. <img src="https://tihai-oss-cloud.itihey.com/img/dc2c9d4b2508f7b583a460d18a348254.png">C. <img src="https://tihai-oss-cloud.itihey.com/img/c1d6512935d389eb84217da892313e41.png">D. <img src="https://tihai-oss-cloud.itihey.com/img/f3b10f26b2963c23327949a825785029.png">
题目9单选题
<img src="https://tihai-oss-cloud.itihey.com/img/f1c231d27c932e86aa1b60070c3ca1c5.png">A. 不相关且相互独立B. 不相关且相互不独立C. 相关且相互独立D. 相关且相互不独立
题目10单选题
<img src="https://tihai-oss-cloud.itihey.com/img/602927848b0c9d63f6f9cdbbdbaec6f5.png">A. 相互独立B. 不独立C. <img src="https://tihai-oss-cloud.itihey.com/img/c1040ac9984219a8850bb54ff8f7798e.png">D. 不相关
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