Find the critical value $\mathrm { z } _ { \alpha / 2 }$ that corresponds to a 91% confidence level.
A) 1.34
B) 1.75
C) 1.70
D) 1.645

Name: Find the critical value $\mathrm { z } _ { \alpha / 2 }$ that corresponds to a 91% confidence level. A) 1.34 B) 1.75 C) 1.70 D) 1.645
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Question

Quizplus · Accepted Answer

For a 91% confidence level, the critical value $\mathrm{z}_{\alpha/2}$ is approximately 1.70, as it corresponds to the tails of the standard normal distribution that leave 4.5% in each tail (since 100% - 91% = 9%, and 9%/2 = 4.5%).

Find the Critical Value zα/2\mathrm { z } _ { \alpha / 2 }zα/2​

Find the Critical Value $\mathrm { z } _ { \alpha / 2 }$