<p>设X1，X2，…，X27是来自均匀分布U(0，3)的一个样本，则样本均值<img alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/72/91/7291770395c291941b8043c067772f29.jpg" style="width: 100%;height: auto;">的近似分布为() <img alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/ac/f0/acf0a52d8e81fa25acdefad930204562.jpg" style="width: 100%;height: auto;"><img alt="" src="https://file.gaojiufeng.cn/learnAppQuestion/91/5f/915f438b5bf69f36187036653076f5c9.jpg" style="width: 100%;height: auto;"></p>