twice
once, (press ALPHA), then 2nd, then 1, then ENTER
once, enter confidence level (AS DECIMAL), then ENTER
| Steps | Key Sequence | Screens |
| 1. Enter data into list, L1 | ||
| 2. Set up Stats Tests | STAT | |
| twice |
|
|
| 8 (for TInterval...) | |
|
| 3. Select Inpt, DATA | left arrow once (if necessary), then ENTER | |
| 4. Select list, L1 | once, (press ALPHA), then 2nd, then 1, then ENTER |
|
| 5. Input confidence level | once, enter confidence level (AS DECIMAL), then ENTER |
|
| 6. Calculate CI | ENTER | |
| In this case the 90% CI is 24.666 to 64.214; the mean of the sample is 44.44; the standard deviation of the sample is 20.741 and the sample size is 5. | ||