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

Question

Quizplus · Accepted Answer

For a 91% confidence level, the critical value $ 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 that corresponds to a degree of confidence of 91%. \text { Find the critical value } \mathrm { z } \alpha / 2 \text { that corresponds to a degree of confidence of } 91 \% \text {. } Find the critical value zα/2 that corresponds to a degree of confidence of 91%.

$\text { Find the critical value } \mathrm { z } \alpha / 2 \text { that corresponds to a degree of confidence of } 91 \% \text {. }$