设X1, X2, X3, X4为来自总体X的样本,且X~N(μ,32), 
为样本均值,则
____
【正确答案】：9/4
设X1, X2, X3, X4为来自总体X的样本,且X~N(μ,32), 为样本均值,则____
- 2024-08-03 22:17:45
- 概率论与数理统计（二）(02197)
【正确答案】：9/4
设X1, X2, X3, X4为来自总体X的样本,且X~N(μ,32), 为样本均值,则____