9.5 Hypothesis Tests for One Population Mean When σ Is Known

使用z-test前提(同使用mean distribution之前的考虑)

在H0假设的同时需要说明significant level

Statistical Significance Versus Practical Significance:综合考虑使用sample 得到的mean和H0的mean,就实际意义来看,如果差不多则可以约等。

The Relation between Hypothesis Tests and Confidence Intervals:其联系在于σ,置信区间是 unreject region所在横坐标;p值是 reject region 所在区域面积

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