I have 4 measurements: 40.1714, 40.1718, 40.1721 and 40.1725. The calculated standard deviation is 0.00046547466812633. With which precision (number of decimals) do I report this number as "mean +/- standard deviation" and why?
Thanks
2026-02-23 11:17:25.1771845445
Precision and significant digits in reporting standard deviation
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