twice
once (if necessary), then ENTER
once, enter mean of SAMPLE, then ENTER
| Steps | Key Sequence | Screens |
| 1. Set up Stats Tests | STAT | |
| twice |
|
|
| 8 (for TInterval...) | |
|
| 2. Select Input | once (if necessary), then ENTER |
|
| 3. Input mean of SAMPLE | once, enter mean of SAMPLE, then ENTER |
|
| 4. Input standard deviation | enter standard devation of SAMPLE, then ENTER | |
| 5. Input sample size | enter sample size, then ENTER | |
| 6. Input confidence level | enter confidence level (AS DECIMAL), then ENTER | |
| 7. Calculate CI | ENTER | |
| In this case the 95% CI is 18.687 to 70.193. | ||