[第一节 随机样本、直方图和箱线图](%E7%AC%AC%E4%B8%80%E8%8A%82%E9%9A%8F%E6%9C%BA%E6%A0%B7%E6%9C%AC%E3%80%81%E7%9B%B4%E6%96%B9%E5%9B%BE%E5%92%8C%E7%AE%B1%E7%BA%BF%E5%9B%BE.md) [第二节 抽样分布](%E7%AC%AC%E4%BA%8C%E8%8A%82%E6%8A%BD%E6%A0%B7%E5%88%86%E5%B8%83.md)