Software output for a one-sample t-interval shows x-bar = 25.0, SE = 1.2, df = 19, t* = 2.093.
The 95% CI is approximately:
- A
(20.00, 30.00)
- B
(24.00, 26.00)
- C
(23.80, 26.20)
- Dcheck_circle
(22.49, 27.51)
Explanation
ME = 2.093 * 1.2 = 2.51. CI = 25.0 ± 2.51 = (22.49, 27.51).