The 99% confidence interval of a mean difference is from .04 to 1.49. This suggests that the mean difference is significant at the alpha = .05 level.

Question

Quizplus · Accepted Answer

A 99% confidence interval means there is a 99% probability that the true population mean falls within the given interval. Since the interval does not include zero (which represents no difference between the two means), we can conclude that the mean difference is statistically significant at the alpha = .05 level, as the confidence interval is entirely above zero. Therefore, we can choose option A as the correct answer.

The 99% Confidence Interval of a Mean Difference Is from .04