Two independent samples: x-bar1 - x-bar2 = 4.5, SE = 1.5, conservative df = 14, t* = 2.145 for 95%.
What is the 95% CI for mu1 - mu2?
- A
(2.00, 7.00)
- B
(3.00, 6.00)
- C
(0.00, 9.00)
- Dcheck_circle
(1.28, 7.72)
Explanation
ME = 2.145 * 1.5 = 3.22. CI = 4.5 ± 3.22 = (1.28, 7.72).