Question

1. Use the following information for Questions 1-4.

A technician services computers for faculty members

at SPU. Depending on the type of malfunction, the service call can take 1, 2, 3, or 4 hours. The

different types of malfunctions occur at about the same frequency. The distribution for the duration

of a service call follows which of the following distributions?

a. Uniform

b. Binomial

c. Bell-shaped

d. Normal

2. How does the probability distribution function (pdf) of the duration of a service call looks like?

a. f(x) = ¼ for 1≤x≤4; 0 elsewhere

b. f(x) = ¼ for 1≤x≤4; 1 elsewhere

c. f(x) = ¼ for 1<x<4; 0 elsewhere

d. f(x) = ¼ for 1<x<4; 1 elsewhere

3. What is the probability that a service call will take 3 hours?

a. 0.20

b. 0.25

c. 0.30

d. 0.50

4. A service call has just come in but the type of malfunction is unknown. It is 3:00 P.M. and technicians

usually get done at 5:00 P.M. The technician always takes his dog out for a walk immediately after

work, and his dog gets “upset" when he is late (he has to work overtime). What is the probability of an

upset dog tonight?

a. 0.25

b. 0.50

c. 0.75

d. 1.00

Answer 1