$$\text { Find the critical value } \mathrm { z } _ { \alpha / 2 } \text { that corresponds to a degree of confidence of } 98 \% \text {. }$$
A)2.05
B)1.75
C)2.33
D)2.575

Question

Quizplus · Accepted Answer

For a 98% confidence level, the critical value $ z_{\alpha/2} $ corresponds to the 99th percentile of the standard normal distribution (since 1% is split into two tails, each tail has 0.5%). The z-score for 0.5% in the upper tail is approximately 2.33.