MATH 1040 - Introduction to Statistics
Practice
- What is the critical value for the 76% confidence level?
If the central area is 76%, then the remaining 24% is in the tails, with 12% in each tail.
- Using a Z-Table with a left tail of 12%, we get a critical value of
This would be a critical value between -1.17 and -1.18. So, remembering that we have both positive and negative values, the critical value is $\mathbf{\pm}$ 1.175.
If we use Desmos, we get the same result.
