Estimate what you think the uncertainty is in weighing, using the buret, and in endpoint location. Do error propagation from these values and compare with the observed precision.
估计一下在秤量，使用滴定管和确定终定位置的不确定度。用这些值计算误差传播而且跟所观测值比较一下。
2
Mean. Estimate what you think the uncertainty is in weighing, using the buret, and in endpoint location.