Message370701
If we estimate the mean using a sample we loose one degree of freedom so it will be divided by N-1, while if we have the mean independent of the sample it should be divided by N to be unbiased.
i.e.
example 1
sqrt(((1-1.5)²+(2-1.5)²)/(2-1)) = 0.7...
example 3
sqrt(((1-1.5)²+(2-1.5)²)/(2)) = 0.5 |
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Date |
User |
Action |
Args |
2020-06-04 08:59:42 | Folket | set | recipients:
+ Folket, rhettinger, steven.daprano |
2020-06-04 08:59:42 | Folket | set | messageid: <1591261182.03.0.0286376992725.issue40855@roundup.psfhosted.org> |
2020-06-04 08:59:42 | Folket | link | issue40855 messages |
2020-06-04 08:59:41 | Folket | create | |
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