Which of the Following Critical Values Is Appropriate for a $\sigma = 27$

question 47

Multiple Choice

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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