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

question 110

Multiple Choice

In the formula $\bar { x } \pm z _ { \mathfrak { w } / 2 } \sigma / \sqrt { n }$ , the $\alpha / 2$ refers to:

• A) the probability that the confidence interval will contain the population mean.
• B) the probability that the confidence interval will not contain the population mean.
• C) the area in the lower tail or upper tail of the sampling distribution of the sample mean.
• D) the level of confidence.

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