Question

Coronary bypass surgery: A healthcare research agency reported that 68% of people who had coronary bypass surgery in 2008 were over the age of 65. Fifteen coronary bypass patients are sampled. Round the answers to four decimal places. Part 1 of 4 (a) What is the probability that exactly 10 of them are over the age of 65? The probability that exactly 10 of them are over the age of 65 is Part 2 of 4 (b) What is the probability that more than 11 are over the age of 65? The probability that more than 11 are over the age of 65 is Part 3 of 4 (c) What is the probability that fewer than 8 are over the age of 65? The probability that fewer than 8 are over the age of 65 is is Part 4 of 4 (d) Would it be unusual if all of them were over the age of 65? It (Choose one) be unusual if all of them were over the age of 65.

Answer 1

Plover 65) = 0.68 mz 15 e0 (10) = 9, Co-60 °C 1-0-6855 = 0.213007 t @ pcmore then 1) = Ret PC123+ PC13) + P(A) + P(15) ad 60.6872 (1-0.6872 +65 0.68'341-0.68) + 60.68)%4C6-0.68) + Celing (0.683' 2 0.24191 | (c) P (fewer than 8) => I using normal approximation ! Az 10.9_ J=1.8066 | P(x<8) = PL Z 8-10.3.1 1.8066) = P(Z <-12177) = 0.1112 d) PL2-15) - 6.60915 = 0.00307 .at would be unusual as probability is very small