If the confidence interval for the difference in treatment means contains zero, then:
A) we can conclude that there is a significant difference in the selected treatment means.
B) we can conclude that there is no significant difference in the selected treatment means.
C) we can conclude that the selected treatment means both equal zero.
D) we can conclude that at least one of the selected treatment means equals zero.

Question

Quizplus · Accepted Answer

If the confidence interval contains zero, it means that there is a possibility that the difference between the treatment means is zero. Thus, we cannot conclude that there is a significant difference in the selected treatment means. We can only conclude that we do not have sufficient evidence to reject the null hypothesis of no difference between the treatment means.

If the Confidence Interval for the Difference in Treatment Means