【判断题】【消耗次数：1】
任意连续型随机变量均有方差存在
①
正确
②
错误
参考答案：
复制
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<img class=jc-formula data-tex={ (EX) }^{ 3 } src=https://huaweicloudobs.ahjxjy.cn/951D7F253830F2DB1A0836B18079E0D1.png style=vertical-align: middle;/>
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