A company has many salespersons working in many sales regions. The volume of sales generated by each person was calculated for the first day in September. The standard deviation of the western sales staff was $83. The standard deviation for the eastern sales staff was $64. A sample of 25 eastern staff had a mean of $550. A sample of 30 western was $590. What is the probability of observing these sample means if the population means are the same? 0.0488 0.0244 0.1970