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

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

Quizplus · Accepted Answer

The subscript for the area in the tail of the sampling distribution is denoted as $/alpha/2$, not $z_d2$.

In the Formula xˉ±zd2σ/n\bar { x } \pm z _ { d 2 } \sigma / \sqrt { n }xˉ±zd2​σ/n​

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