Suppose all 500 patients from the heart clinic in problem 2 (call it clinic A) a

Question

Suppose all 500 patients from the heart clinic in problem 2 (call it clinic A) also went to another clinic (call it clinic B) and had their NYHA class evaluated. Clinic B does not see other patients, so the patient population for clinic A and clinic B is the same. Clinic B determined that 260 patients have NYHA class I and 240 do not have NYHA class 1. According to clinic B, what is the probability that a randomly selected patient will have NYHA class I? Given the information in problem 2 and problem 3 so far, can you determine how likely a patient would be diagnosed with NYHA I at clinic B if they w are diagnosed with NHYA 1 at clinic A? Now, suppose that clinic B informed us that of the 260 patients diagnosed with NYHA I by its clinic, 200 were also diagnosed with NYHA I at clinic A. If a patient is diagnosed with NYHA I at clinic A, how likely is it they will be diagnosed with NYHA I at clinic B? And, vice versa (if a patient is diagnosed with NYHA I at clinic B, how likely is it they will be diagnosed with NYHA I at clinic A)?

Explanation / Answer

We do not have the information from Question# 2, so only part a can be answered her:

Answer to part a)

As per clinic B : 260 patients have NYHA class I and 240 do not have

Thus total patients = 260+240=500

We need to find the Probability of a patient to have NYHA class I

P = 260/500 = 0.52

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