An electronic balance weighs a calibration mass ten times
PHYSICS · Multi-part · Fermi University Physics · Scientific Practice & Experimental Methods · Uncertainty in measurement · Uncertainty in measurement
Measurement and Method, Ch Type A, Type B and the uncertainty budget
Problem
An electronic balance weighs a calibration mass ten times, giving (g): 20.001, 20.003, 20.002, 20.004, 20.001, 20.003, 20.002, 20.004, 20.002, 20.003.
((a)) Evaluate the Type A standard uncertainty of the mean mass, with its degrees of freedom.
((b)) The balance's calibration certificate states the reading is accurate to within ±0.002g, with nothing favouring the middle of that interval. Evaluate the Type B standard uncertainty this contributes, naming the distribution assumed.