QUESTION 6 50 patients are examined by two physicians in diagnosis of asthma. Physician A diagnosed...

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math Statistics-And-Probability

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Answer 1

Answer #1

P(A)=20/50

P(B)=18/50

P(A and B)=15/50

P(A U B)= P(A)+P(B)-P(A and B)=23/50

not having asthma by both physicians=1-P(A U B)=27/50=0.54= 0.5

Option 2 is correct

The kappa measure of agreement is the ratio

[P(D)-P(E)]/[1-P(E)]

P(D)=patients diagnosed with not having asthma by both physicians+patients diagnosed of having asthma by both physicians= 27/50+15/50 = 0.84

P(E)=(20*18/50+30*32/50)/50=0.528

PD - PE 1- PE 0.84 -0.528 1-0.528 = 0.666 = 0.7

Option 3. 0.7 is correct

kappa=0.66

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Answer 2

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