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Aug 17, 2019 at 18:48 comment added maxathousand @PLL A fair point, but I referenced it simply as a physical example of a bar chart where the intent is to read a specific value :)
Aug 17, 2019 at 13:33 comment added PLL @maxathousand: To a sufficiently casual glance; sure, but on plenty of mercury themometers, the meniscus is very visible if you’re looking closely to get a precise reading. Growing up in the 80s–90s, when mercury thermometers were more ubiquitous than today, this was an important point taught in both science and health classes: take the reading from the centre of the meniscus, not the edges.
Aug 16, 2019 at 22:50 comment added maxathousand @slebetman Well, yes this is true, but the meniscus is typically very slight because a glass thermometer’s inner diameter is often quite narrow, so it appears flat to casual observers.
Aug 16, 2019 at 21:44 comment added slebetman Interestingly, due to surface tension, mercury glass thermometers cannot have a flat end - they tend to have rounded corners/ends
Aug 15, 2019 at 13:35 vote accept essdeepee
Aug 14, 2019 at 22:30 comment added Schmuddi I've toyed around with the data set that is provided by the authors of the study from my answer. My exploratory analysis suggests that not only the error rate during the comparisons increases, but also the time needed to do the comparisons. This might also affect the efficiency of communicating general values.
Aug 14, 2019 at 21:28 comment added Delioth Addendum: it might be worthwhile to note that you'd still be able to style as you like if your users are trying to read a specific value, if you also provide the data itself (i.e. you're using the bar to represent a 'close' value, and showing the 'real' value beside).
Aug 14, 2019 at 18:05 history answered maxathousand CC BY-SA 4.0