{COM: For comparing two numbers with uncertainties, one can use certain standard measures, like |A - B|/(|DA| + |DB|) or |A - B|/sqrt(DA^2 + DB^2). If this number is much smaller than one, one can be confident A and B are matching and much bigger than one, they are not matching. But in case this number is close to one like in pre-lab 7, comparing 21.5 ± 0.6 and 22.3 ± 0.4, you are better off reporting one of these standard measures, instead of giving a decision if they match or not. Later, depending on the purpose, one can decide.}
{U: Units are missing or use units more often. I know sometimes it is too redundant to put units everywhere, but you need to use units more often. At least use them on the finishing point.}
{H: How did you get these values? The source of any numerical value you are reporting must be clear. Usually in our lab it is either based on a measurement or a calculation. Be more clear about where a value comes from.}
{NU: No uncertainty given for a reported value.}
{LSF: The least significant figures for a value and its uncertainty must match. For example, these are wrong: 31 ± 0.2 or 31.46 ± 2.2 or 0.125 ± 0.0021. But these are correct: 31.3 ± 0.2 or 31.46 ± 0.23 or 0.125 ± 002.}
{TM: Too many significant figures used for the uncertainty. Use one or at most two. If you use one, you can easily estimate the uncertainty calculations in your head. For example do not report x = 31.57643 ± 0.45891 and instead just do x = 31.57 ± 0.46 or x = 31.6 ± 0.5.}