Question 1168602
fail to reject (B)
4 is within the CI, so it is a plausible value in the context of this question, which I believe was that Cal arrests were the same as Nevada's (which I think was 4).

The point is that if the CI contains the parameter one is testing, then there is no difference. If the CI doesn't contain the parameter of interest, there is a difference. Any value within the CI may be considered a plausible value for the parameter of interest.