thiemowmde added subscribers: JanZerebecki, Jonas. thiemowmde added a comment.
Random PDFs found via this Google search <https://www.google.de/search?q=uncertainty+plus+minus+one>: Pro ±1 ====== http://physicsed.buffalostate.edu/pubs/MeasurementAnalysis/MA1_9ed.pdf says: > Determining uncertainties is a bit more challenging since you—not the > measuring device— must determine them. When determining an uncertainty from a > measuring device, you need to first determine the smallest quantity that can > be resolved on the device. Then [...] the uncertainty in the measurement is > taken to be this value. For example, if a digital readout displays 1.35 g, > then you should write that measurement as (1.35 ± 0.01) g. The smallest > division you can clearly read is your uncertainty. Note that this document is mostly talking about reading from **analog** devices, even if the quoted text says "digital readout". Personally, I think there is something confused. Pro ±0.5 ======== https://www.wmo.int/pages/prog/gcos/documents/gruanmanuals/UK_NPL/mgpg11.pdf says: > The divisions on the tape are millimetres. Reading to the nearest division > gives an error of no more than ±0.5 mm. We can take this to be a uniformly > distributed uncertainty (the true readings could lie variously anywhere in > the 1 mm interval - i.e. ±0.5 mm). http://www.calpoly.edu/~gthorncr/ME236/documents/Exp.1.IntroductiontoMeasurement.pdf says: > The procedure for taking [a] reading [from a digital display] is simple: > Record exactly what you read from the digital display. [...] 0.30 g. Note > that a value of 0.3 g or 0.300 g is incorrect, because either value > misrepresents the resolution of the device. [...] the true value of the mass > is within 0.2950 ≤ mass ≤ 0.3049. This is implied because the device will > round any value in this range to 0.30, the closest reading on the display. It > is standard to record this measurement as **mass = 0.30 ± 0.005 g**. In the > above format, the value 0.30 is called the nominal value. The second term, ± > 0.005, is called the reading error. It is equal to one-half the resolution > (the smallest division between readings, sometimes called the least count for > digital devices). TASK DETAIL https://phabricator.wikimedia.org/T105623 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: thiemowmde Cc: Jonas, JanZerebecki, harej-NIOSH, Thryduulf, Mike_Peel, Jc3s5h, thiemowmde, kaldari, daniel, Stryn, Lydia_Pintscher, Liuxinyu970226, Snipre, Event, Ash_Crow, mgrabovsky, Micru, Denny, He7d3r, Bene, Wikidata-bugs, Ricordisamoa, Kelson, MSGJ, Wolfvoll, Aklapper, aude _______________________________________________ Wikidata-bugs mailing list Wikidata-bugs@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata-bugs
