 So to work out the uncertainty on a single measurement, any single measurement is likely to be within half the range of the average value. So that's actually a pretty simple calculation. So an uncertainty of an individual reading is just half the range. So the range is the maximum minus the minimum. Okay, so any existing or future measurement is likely to be within half the range of whatever your average value is. So we say that an individual measurement or reading has an uncertainty of half the range. Now it's really important to point out here that the value of this uncertainty here is not necessarily the same as whatever your instrumental uncertainty is. So whatever uncertainty you anticipated based on the size of the divisions on your measuring instrument. The uncertainty that you calculate for an individual reading might turn out to be larger than the instrument uncertainty because of sources of random error that cause the numbers to vary evenly above and below where your average value is. So if you go back and look at our data here, the range of the data is the maximum value, which is 1.59 minus the minimum value, which is 1.53, which gives us a range of 0.06 volts. And so our uncertainty on our voltage, which we symbolize with that triangle there, the uncertainty is half the range, which equals 0.03 volts. So we can say that on any individual reading that we have listed below there, 0.03 volts is the uncertainty on the number listed. Now this number of uncertainty supersedes any uncertainty estimate that you may have made based on the size of the divisions on your measuring instrument.