Do one of the following, as appropriate: (a) Find the critical value $\mathrm { z } \alpha / 2 \text {, (b) find the critical value } \mathrm { t } _ { \alpha / 2 }$ (c) state that
neither the normal nor the t distribution applies.
-$98 \% ; n = 7 ; \sigma = 27 ;$ population appears to be normally distributed.
A) $\mathrm { t } _ { \alpha / 2 } = 1.96$
B) $\mathrm { t } _ { \alpha / 2 } = 2.575$
C) $z _ { \alpha / 2 } = 2.33$
D) $\mathrm { z } _ { \alpha / 2 } = 2.05$

Question

Quizplus · Accepted Answer

The population is normally distributed, so the critical value is from the normal distribution. The confidence level is 98%, so $\alpha = 0.02$. The critical value is $\mathrm { z } _ { \alpha / 2 } = \mathrm { z } _ { 0.01 } = 2.33$.

Do One of the Following, as Appropriate: (A) Find the Critical