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March 29th, 2017, 04:03 PM  #1 
Senior Member Joined: May 2015 From: Arlington, VA Posts: 361 Thanks: 26 Math Focus: Number theory  One measure significant in standard deviation?
When is one observation not considered statistically significant, such as subtracting one (Bessel's correction) while calculating standard deviation?

March 29th, 2017, 04:24 PM  #2 
Global Moderator Joined: May 2007 Posts: 6,527 Thanks: 588 
There is no standard deviation for one observation.

March 29th, 2017, 07:10 PM  #3 
Senior Member Joined: May 2015 From: Arlington, VA Posts: 361 Thanks: 26 Math Focus: Number theory 
So does one use N1 or N in the standard deviation radical's denominator?

March 30th, 2017, 06:08 PM  #4 
Global Moderator Joined: May 2007 Posts: 6,527 Thanks: 588  

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deviation, measure, significant, standard 
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