2,992
回編集
差分
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**b)
{|class="wikitable"
|-
!
!With disease
!Without disease
|-
!test positive
|316.35
|1999.2
|-
!test negative
|13.34
|653.66
|-
!sum
|333
|667
|}
***Positive predictive value=<math>\frac{316.35}{316.35+13.34}=0.959</math>
***Negative predictive value=<math>\frac{653.66}{1999.2+653.66}=0.246</math>
