。。 · 2025年06月17日
NO.PZ2024120401000009
问题如下：
An experiment yields the following data:
It is hypothesized that the data come from a uniform distribution, U(0, b). What are the unbiased estimators of the mean and variance?
选项：
A.
0.39 0.08
B.
0.45 0.086
C.
0.39 0.086
D.
0.45 0.086
解释：
The sample mean is already unbiased:
For the variance:
为什么用计算器计算结果会有偏差
NO.PZ2024120401000009 问题如下 experiment yiel the following ta:It is hypothesizeththe ta come from a uniform stribution, U(0, b). Whare the unbiaseestimators of the meanvariance? A.0.39 0.08 B.0.45 0.086 C.0.39 0.086 0.45 0.086 The sample meis alrea unbiaseFor the variance: 除了明确要无偏估计的样本方差，除以n-1而不是n的计算方式会在frm其他题目里面挖坑吗？感觉遇到的很少
NO.PZ2024120401000009 问题如下 experiment yiel the following ta:It is hypothesizeththe ta come from a uniform stribution, U(0, b). Whare the unbiaseestimators of the meanvariance? A.0.39 0.08 B.0.45 0.086 C.0.39 0.086 0.45 0.086 The sample meis alrea unbiaseFor the variance: 在哪一个单元的section里面
NO.PZ2024120401000009问题如下 experiment yiel the following ta:It is hypothesizeththe ta come from a uniform stribution, U(0, b). Whare the unbiaseestimators of the meanvariance? A.0.39 0.08B.0.45 0.086C.0.39 0.0860.45 0.086 The sample meis alrea unbiaseFor the variance: 请问这个uniform stribution在哪个知识点啊，没太看懂
NO.PZ2024120401000009 问题如下 experiment yiel the following ta:It is hypothesizeththe ta come from a uniform stribution, U(0, b). Whare the unbiaseestimators of the meanvariance? A.0.39 0.08 B.0.45 0.086 C.0.39 0.086 0.45 0.086 The sample meis alrea unbiaseFor the variance: 0.080是怎麼算出來的？
