The following values represent the population of home mortgage interest rates (in percents) being charged by the banks in a particular city: 3.3,3.5,4.5,4.0,4.3,3.9,3.8,4.1,4.2,3.7. Given this information, what is the most extreme amount of sampling error possible if a random sample of n=3 banks is surveyed and the mean loan rate is calculated?