Answer :
The total number of people who have the disease is 115.
The total number of people in the sample population is
Total = 175
The negative predictive value is
NPV= (TN / (TN + FN)) = (25 / (25 + 55) = 25 / 80 = 0.3125
The positive predictive value
PPV = (TP / (TP + FP)) = (60 / (60 + 35) = 60 / 95 = 0.6316
The sensitivity of the test
Sensitivity = (TP / (TP + FN)) = (60 / (60 + 55) = 60 / 115 = 0.5217
The total number of people who have the disease
= 60+55 = 115
The number of False Positives (FP)
= 35
The number of True Positives (TP)
= 60
The total number of people that tested negative
= 80
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