Explain the prior probabilities of disease a and disease b

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A patient in a doctor's oce has a rash. Statistics say that 80% of patients with this kind of rash have Disease A, and the other 20% have Disease B.

The doctor performs a blood test on the patient and discovers that the patient has low iron. Among people who have Disease A, 15% have low iron. Among people with Disease B, 90% have low iron.

(a) What are the prior probabilities of Disease A and Disease B, before the blood test?

(b) Based on these prior probabilities, which disease is more likely, before the blood test?

(c) What are the posterior probabilities of Disease A and Disease B, after the blood test results are known?

Reference no: EM132858369

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