Message 370701 - Python tracker [proxy]

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Author	Folket
Recipients	Folket, rhettinger, steven.daprano
Date	2020-06-04.08:59:41
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1591261182.03.0.0286376992725.issue40855@roundup.psfhosted.org>
In-reply-to

Content
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

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

History
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