内容:看完第十章 重点:1、计算总体均值的置信区间
2、z-statistic、t-statistic区分及各自计算
3、中心极限定理 强化:1、中心极限概念还要理清:In many instances, the discribution is not normal. The central limit theroem states that if the sample size is large, regardless of the shape, the distribution of the sample mean is approximately normal.
2、区分几类bias(产生的原因)
3、z-statistic、t-statistic计算的区分要加强(查表的依据不同,后者与sample size有关)