: Suppose that the heart failure is 13% of time due to stress and 87% of time du

Question

: Suppose that the heart failure is 13% of time due to stress and 87% of time due to natural non-stress conditions. Answer to the following questions:

a) What is the probability heart failure in that the first patient who is admitted to a hospital is due to stress? b) What is the probability that the 3rd patient with heart failure who is admitted is due to stress?

c) How many numbers of patients are expected (on average) to be admitted with non-stress conditions before the first patient with stress related heat failure is admitted?

Explanation / Answer

p = 0.13 = heart failure

q = 0.87 = non stress

Two outcomes

a) 0.13

b) 0.13 (since each patient is independent)

c) E(X') = Expected no of patients with non stress = approximately 7 (87/13)

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