Which of the following critical values is appropriate for a $98 \%$ confidence level where $n = 7$; $\sigma = 27$ and the population appears to be normally distributed.
A) $z _ { \alpha / 2 } = 2.33$
B) $z _ { \alpha / 2 } = 2.05$
C) $t _ { \alpha / 2 } = 1.96$
D) $t _ { \alpha / 2 } = 2.575$

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The Answer of Which of the following critical values is appropriate for a $98 \%$ confidence level where $n = 7$; $\sigma = 27$ and the population appears to be normally distributed.
A) $z _ { \alpha / 2 } = 2.33$
B) $z _ { \alpha / 2 } = 2.05$
C) $t _ { \alpha / 2 } = 1.96$
D) $t _ { \alpha / 2 } = 2.575$

Which of the Following Critical Values Is Appropriate for A 98