Which of the following 95% confidence intervals for the difference between two means most likely indicates that the two means are truly different from one another in the population?
A)95% CI [-.05, .05]
B)95% CI [-1.2, 17.6]
C)95% CI [-7.2, -3.4]
D)95% CI [.00, 5.6]

Question

Quizplus · Accepted Answer

C) 95% CI [-7.2, -3.4] most likely indicates that the two means are truly different because the entire interval is either less than or greater than zero, suggesting a significant difference between the two means.

Which of the Following 95% Confidence Intervals for the Difference