
Algebra PreAlgebra and Basic Algebra Math Forum 
 LinkBack  Thread Tools  Display Modes 
April 8th, 2013, 02:50 PM  #1  
Member Joined: Jan 2012 From: Montreal, Canada Posts: 30 Thanks: 0  none in +/ 2 standard deviations
I have for sample: Quote:
I think ? would be smaller so there is something in that range (+/2?). Or perhaps there's some concept I don't understand which would make it possible for the whole sample to be limited in 1?.  
April 9th, 2013, 12:01 PM  #2 
Global Moderator Joined: May 2007 Posts: 6,770 Thanks: 700  Re: none in +/ 2 standard deviations
2? is the bound for approximately 95% of a sample. Since your sample size is 14, it is not surprising that they are all inside this range.

April 9th, 2013, 02:39 PM  #3 
Member Joined: Jan 2012 From: Montreal, Canada Posts: 30 Thanks: 0  Re: none in +/ 2 standard deviations
Thanks. At least I know it's not erroneous but it's weird for me to understand. Well I guess it's hard to have 1/20 in the range when there's not even 20 items. I didn't think about it that way.

April 9th, 2013, 02:43 PM  #4  
Member Joined: Jan 2012 From: Montreal, Canada Posts: 30 Thanks: 0  Re: none in +/ 2 standard deviations
Darn! I can't edit my last post. Well this is its PS. Quote:
Anyway I'm not concerned about the issue anymore.  

Tags 
deviations, standard 
Search tags for this page 
Click on a term to search for related topics.

Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Testing standard deviations  tay101  Advanced Statistics  0  March 15th, 2014 12:35 PM 
Stochastic Calculus of Standard Deviations  An Introduction  amin  Algebra  0  October 19th, 2013 11:52 PM 
squared deviations vs length of the treatment groups  nash551  Advanced Statistics  0  September 14th, 2013 07:20 AM 
Standard deviations(sd) Games of chance  ybot  Advanced Statistics  0  December 24th, 2012 05:53 AM 
Gambling deviations  kev  Advanced Statistics  2  February 13th, 2011 10:50 PM 