Do one of the following, as appropriate: (a) Find the critical value ${ } ^ { Z } \alpha / 2$ , (b) find the critical value ${ } ^ { t } \alpha / 2$ 99%; n = 17; $\alpha$ is unknown; population appears to be normally distributed.
A) zσ/2 = 2.583
B) tσ/2 = 2.921
C) tσ/2 = 2.898
D) zσ/2 = 2.567

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The Answer of Do one of the following, as appropriate: (a) Find the critical value ${ } ^ { Z } \alpha / 2$ , (b) find the critical value ${ } ^ { t } \alpha / 2$ 99%; n = 17; $\alpha$ is unknown; population appears to be normally distributed.
A) zσ/2 = 2.583
B) tσ/2 = 2.921
C) tσ/2 = 2.898
D) zσ/2 = 2.567

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