In the formula $\bar { x } \pm z _ { a / 2 } \sigma / \sqrt { n }$ , the subscript$\alpha$ / 2 refers to the area in the lower tail or upper tail of the sampling distribution of the sample mean.

Question

Quizplus · Accepted Answer

The subscript $\alpha$ / 2 refers to the area in the lower tail of the sampling distribution of the sample mean.

In the Formula xˉ±za/2σ/n\bar { x } \pm z _ { a / 2 } \sigma / \sqrt { n }xˉ±za/2​σ/n​

In the Formula $\bar { x } \pm z _ { a / 2 } \sigma / \sqrt { n }$