Four sample measurements are 20.08, 20.1, 20.12, 20.14 mm. Target dimension is 20 mm with symmetric tolerance ±0.2 mm. Compute descriptive sample statistics only; four observations do not establish long-term capability. Mean error is mean minus nominal.
Calculate the largest sampled excess above the upper limit in mm. Keep intermediate values unrounded; round the final result to four decimal places if necessary.
