MATH 1040 - Introduction to Statistics
Practice
- What is the critical value for the 83% confidence level?
If the central area is 83%, then the remaining 17% is in the tails, with 8.5% in each tail.
- Using a Z-Table with a left tail of 8.5%, we get a critical value of
Remembering that we have both positive and negative values, the critical value is $\mathbf{\pm}$ 1.37.
If we use Desmos, we get the same result.
