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概率、概率分布与抽样分布（精品）
* * As a result of this class, you will be able to ... * As a result of this class, you will be able to ... * * * * As a result of this class, you will be able to ... * * 3 * * As a result of this class, you will be able to ... * * * * As a result of this class, you will be able to ... * * * As a result of this class, you will be able to ... * * * As a result of this class, you will be able to ... * * * * * * * * * * As a result of this class, you will be able to ... * * As a result of this class, you will be able to ... * As a result of this class, you will be able to ... * As a result of this class, you will be able to ... * As a result of this class, you will be able to ... * As a result of this class, you will be able to ... * As a result of this class, you will be able to ... * As a result of this class, you will be able to ... * As a result of this class, you will be able to ... * As a result of this class, you will be able to ... * As a result of this class, you will be able to ... * * * As a result of this class, you will be able to ... * As a result of this class, you will be able to ... * As a result of this class, you will be able to ... * * As a result of this class, you will be able to ... * As a result of this class, you will be able to ... * * As a result of this class, you will be able to ... * As a result of this class, you will be able to ... * * * As a result of this class, you will be able to ... * * As a result of this class, you will be able to ... * * * * * * * 样本均值的抽样分布 在重复选取容量为n的样本时，由样本均值的所有可能取值形成的相对频数分布 一种理论概率分布 推断总体均值?的理论基础 样本均值的抽样分布 样本均值的抽样分布 (例题分析) 【例】设一个总体，含有4个元素(个体) ，即总体单位数N=4。4 个个体分别为x1=1，x2=2，x3=3，x4=4 。总体的均值、方差及分布如下 总体分布 1 4 2 3 0 .1 .2 .3 均值和方差 样本均值的抽样分布 (例题分析) ? 现从总体中抽取n＝2的简单随机样本，在重复抽样条件下，共有42=16个样本。所有样本的结果为 3,4 3,3 3,2 3,1 3 2,4 2,3 2,2 2,1 2 4,4 4,3 4,2 4,1 4 1,4 4 1,3 3 2 1 1,2 1,1 1 第二个观察值 第一个 观察值 所有可能的n = 2 的样本（共16个） 样本均值的抽样分布 (例题分析) ? 计算出各样本的均值，如下表。并给出样本均值的抽样分布 3.5 3.0 2.5 2.0 3 3.0 2.5 2.0 1.5 2 4.0 3.5 3.0 2.5 4 2.
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