Dpuiu definitions: Difference between revisions

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   Sensitivity=TP/(TP+FN)
   Sensitivity=TP/(TP+FN)
   Specificity=TN/(TN+FP)
   Specificity=TN/(TN+FP)
 
 
                     status       
                     status       
   outcome          +    -
   outcome          +    -
   +                TP  FP
   +                TP  FP
   -                FN  TN
   -                FN  TN
 
 
   FP: Type I error (P value)
   FP: Type I error (P value)
   FN: Type II error
   FN: Type II error
 
 
   try to minimize FP => increase specificity  
   try to minimize FP => increase specificity  
   Sensitive: align as many reads as possible
   Sensitive: align as many reads as possible
   Specific:  avoid misalignments
   Specific:  avoid misalignments
         
 
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* [http://en.wikipedia.org/wiki/Functional_genomics Functional genomics]
* [http://en.wikipedia.org/wiki/Functional_genomics Functional genomics]

Latest revision as of 14:30, 4 December 2008

 Sensitivity=TP/(TP+FN)
 Specificity=TN/(TN+FP)
 
                   status      
 outcome           +    -
 +                 TP   FP
 -                 FN   TN
 
 FP: Type I error (P value)
 FN: Type II error
 
 try to minimize FP => increase specificity 
 Sensitive: align as many reads as possible
 Specific:  avoid misalignments










  • Q20: the number of bases in a read that have a quality value greater than 20; quality value of 20, there is a 1 in 100 chance that the base has been misidentified