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

Question

Quizplus · Accepted Answer

For a 91% confidence level, the critical value $z _ { \alpha / 2 }$ is found by looking at the z-table for the area in the tails, which is 0.045 (since 1 - 0.91 = 0.09, and 0.09/2 = 0.045). The z-value that corresponds to an area of 0.045 in the tail is approximately 1.70.

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

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