<p>设总体<img max-width="300" src="https://learnfile.20230611.cn/learnAppQuestion/98/88/9888248e87571e810664dc8628fe3c3c.jpg" style="width: 100%;height: auto;"> 为来自总体x的样本， <img max-width="300" src="https://learnfile.20230611.cn/learnAppQuestion/8e/9d/8e - 数量方法（二）(00994)