I have been reading reporst today, all of which include bar charts, and was reminded of the way in which teh scale of a chart can exaggerate or minimise the relative strengths of differences in the data.
That is, if you chart, say, horse weights where the horses are all between 270 and 300 kgs, with the maximum being 300 then that will make the heaviest look much heavier than if you took the chart against a maximum theoretic weight for a horse - say 600kgs.
It made me stop and wonder if there was some better system of presenting data. A convention, which might reduce the potential for misrepresentation. Maybe something based off standard deviation within the data plus some additional relative constant?