


please solve all questions... emergency
9. Births in a hospital occur randomly at an average rate of 1.8 births per hour. process is a Po...
4. Births in a hospital occur randomly at an average rate of 1.8 births per hour. Let X be the number of births in a given hour. (a) Using λ = 1.8, calculate the probability two births in a given hour P(X = 3). (b) What is the probability of observing more than 2 births in a given hour P(X ≥ 2). (hint: the sum of all probabilities is 1.) (c) Calculate E(X) (d) What does this expectation represent? (e)...
Please solve all questions. emergency...
7, of all snowfalls in New Yok, 590 are heavy. After a heavy snowfall, school are closed 67% of the time. After a light snowfall, school are closed 3% of the time. a. (3 pts) Draw a table or a tree diagram? b. (3 pts) Find the probability that school is closed given that it was a heavy snowfall? c. (2 pts) Find the probability that school is open? 8. You sell sandwiches. 70% of...