Which answer would score higher? Not sure where to start? Explain this Answer A The range is 6.5 − 6.1 = 0.4 cm. Half the range is 0.4 ÷ 2, so the uncertainty is ±0.2 cm. Answer B The range is 6.5 − 6.2 = 0.3 cm. Half the range is 0.3 ÷ 2, so the uncertainty is ±0.15 cm.