杭州交通信息网数字城市案例:统计问题
来源：百度文库 编辑：杭州交通信息网 时间：2024/05/06 01:20:20
A sample of five measurements of the diameter of a sphere was recorded by a scientist as 6.33, 6.37, 6.36, 6.32 and 6.37. Determine unbiased and efficient estimates the true variance. Assume that the measured diameter is normally distributed.
The true variance =
The true variance =
鉴于没有计算器在旁边就不能跟你算了
把算法跟你说下
先算平均值
在根据方差公式算
http://cache.baidu.com/c?word=%D1%F9%B1%BE%3B%B7%BD%3B%B2%EE&url=http%3A//www%2Ehuanggao%2Enet/course/40315/ws/SX%5F13%5F01%5F020/&b=0&a=1&user=baidu
所求结果就是你要的答案
平均值为6.35
方差为0.0022