Question 16 options: A bank gets an average of 8.5 customers per hour. Assume the variable follows a Poisson distribution. Find the probability that there will be 4 or more customers at this bank in one hour. (That is, find P(X4)) (round to 4 decimal places) Answer: Question 17 options: Suppose a random variable, x, follows a Poisson distribution. Let = 2.5 every minute, find the P(X 125) over an hour. Round answer to 4 decimal places. Answer: Question 18 options: The number of rescue calls received by a rescue squad in a city follows a Poisson distribution with an average of 2.83 rescues every eight hours. What is the probability that the squad will have exactly 4 calls in two hours? Round answer to 4 decimal places. Answer: Question 19 The table below shows the preferences for elective courses of students who are undecided about their majors.

Philosophy

Digital Art

Film Studies

Male

9

16

22

Female

6

18

14

What is the probability of randomly selecting a student who is female or prefers Digital Art?

Question 19 options:

46.2%

84.7%

21.2%

63.5%

United Blood Services is a blood bank that serves more than 500 hospitals in 18 states. According to their website, a person with type O blood and a negative Rh factor (Rh-) can donate blood to any person with any bloodtype. Their data shows that 43% of people have type O blood and 15% of people have Rh- factor; 52% of people have type O or Rh- factor. Find the probability that a person has both type O blood and the Rh- factor.

Question 20 options:

94% of people have type O, Rh- blood

33% of people have type O, Rh- blood

5% of people have type O, Rh- blood

6% of people have type O, Rh- blood