A crucible is known to weigh 43.4273 g. Five students in the class determine the weight of the crucible by repeated weighings on a simple balance. Using the following information, which student has done the most accurate determination?

A crucible is known to weigh 43.4273 g. Five students in the class determine the weight of the crucible by repeated weighings on a simple balance. Using the following information, which student has done the most accurate determination?