Let's say that you have two sets of performance data on two divisions in your company Which statement is the MOST accurate? A mean performance difference in the two divisions is only sufficient if the sample site in performance observations for both division is also high and the standard deviation in performance for both divisions is also low. A mean performance difference is only sufficient if the standard deviation in performance of both divisions is also high and the sample size in performance of both divisions is also low Sample size cannot help improve the performance comparison between the two divisions The mean difference in performance of the two division is sufficient to tell us which one is the better performer. A mean performance difference can never improve the performance comparison between the two divisions