HW 8 - Homework for lesson 8. PDF

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Homework for lesson 8....

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Levi Moellering HW 8 Jeb 3 November, 2016 Question 2 Part A Question 1 Prevalence

0.1 Prevalence = # of new cases/population size

Question2

PPV= 80/260 NPV=20/72 0 PPV NPV

Sensitivity Specificity Prevalence

Percent

0.8 0.31 0.8 0.028 0.1 Doctors Total Oro Disease Non-Disease Positive 80 180 260 Negative 20 720 740 Total 100 900 1000 Sensitivity = 80/100, Specificity=720/900, Prev=100/1000

31 2.8

Question 6

General Practitioner

Evaluation by Cardiologist

Prevalence

0.2

Sensitivity Specificity

0.75 0.75 GP Diseas e 300 100 400

Sensitivit y Specificity

Positive Negative

Non disease 400 1200 1600

0.9

+

0.9

-

Total 700 1300 2,000

+ -

Sensitivit 0.675 y Specificity 0.775

Cardiologist Diseas Non e disease 270 40

Total 310

30 360 300 400 Combined + -

390 700

270 130 400 Perfect 68

310 1370 2000

78

40 1240 1600

total

Sensitivity= 270/400, Specificity= 1240/1600...