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Brown Veterinary Clinic schedules weekend staff based on the number of animals being boarded. The clinic has a total of four staff members available to work on weekends. Based on state regulations, the clinic is required to have one staff member on site for up to 10 animals. Two staff members are required for 11-23 animals, three staff for 24-36 animals and all four staff members must work if there are 37-45 animals being boarded. The clinic has experienced the following average number of animals in the past 12 weekends.
Average Number of Animals ...Number of Weekends
12 ...............................................1
20 ...............................................4
25 ...............................................3
35 ...............................................2
40 ...............................................2
Using expected value analysis, how many staff members should the clinic schedule for each weekend during the upcoming month?