A local county was interested in the number of times clinics referred patients to specialists. The county collected data on 50 clinics. The county generated the following plot to show the number of patients that clinics referred to specialists during a year. On average, clinics referred about 2000 patients to specialists each year. Label each of the following error bars based on the measure of precision for the mean of the same random sample of patients. 3000 2500 Number of patients 2000 1500