The NIST Reference on Constants, Units and Uncertainty

Fundamental Physical Constants
Constants
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electron-neutron magnetic moment ratio
 $\mu_{\rm e}/\mu_{\rm n}$
 Value  960.920 50
 Standard uncertainty    0.000 23
  Relative standard uncertainty   2.4 x 10-7
 Concise form  960.920 50(23)    
 
Click here for correlation coefficient of this constant with other constants
Source: 2014 CODATA     
recommended values
 
Definition of
uncertainty
 
     Correlation coefficient with
any other constant

 
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