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estimated_standard_deviation [2016/03/14 02:25] hkimscilestimated_standard_deviation [2016/06/23 18:56] hkimscil
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-====== Estimated value of SD ======+====== Why n-1 (Why we use n-1 instead of n in getting standard deviation) ======
 http://www.qc.edu.hk/math/Advanced%20Level/Standard_deviation.htm \\ http://www.qc.edu.hk/math/Advanced%20Level/Standard_deviation.htm \\
 우선, Expected value (기대값)와 Variance (분산)의 연산은 아래와 같이 계산될 수 있다. 우선, Expected value (기대값)와 Variance (분산)의 연산은 아래와 같이 계산될 수 있다.
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 $ E[S^2] = \displaystyle \frac{(n-1)\sigma^2}{n} * \frac{n}{n-1} = \sigma^2 $ $ E[S^2] = \displaystyle \frac{(n-1)\sigma^2}{n} * \frac{n}{n-1} = \sigma^2 $
  
-{{tag>"조사방법론" "표준편차" "n-1" "자유도" "degrees of freedom" "n-1" "표준오차"}}+{{tag>"research methods" "조사방법론" "표준편차" "n-1" "자유도" "degrees of freedom" "n-1" "표준오차"}} 
  
estimated_standard_deviation.txt · Last modified: 2023/09/13 11:00 by hkimscil

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