A large school district held a district-wide track meet for all high school students. For the 2-mile run, the population of female students participating had a mean running time of 8.8 minutes with standard deviation of 3.3 minutes, and the population of male students participating had a mean running time 7.3 minutes with standard deviation of 2.9 minutes. Suppose 8 female students and 8 male students who participated in the 2-mile run are selected at random from each population. Let x¯F represent the sample mean running time for the female students, and let x¯M represent the sample mean running time for the male students. What are the mean and standard deviation of the sampling distribution of the difference in sample means x¯F−x¯M ?