1. Consider a single-server queuing system. If the arrival rate is 45 customers per hour and it takes 1 minute on average to serve a customer, what is the average waiting time in the waiting line in minutes?

a) 3

b) 0.05

c) 4

d) 1.02

e) -1.02

19. Cover Me, Inc. sells umbrellas in three cities. Management assumes that annual rainfall is the primary determinant of umbrella sales, and it wants to generate a linear regression equation to estimate potential sales in other cities. Given the data below, what is the sales forecast if City D has 24 inches of annual rainfall?

Rainfall Sales

X Y

City A 30 in. 2000

City B 25 in. 1500

City C 12 in. 1300

a) 1225

b) 1450

c) 1575

d) 1660

e) 1800

Use the following data to answer the next three questions. The times are in weeks.

O ML P

A 2 8 9

B 3 4 7

C 5 6 8

29. Suppose that the path is A->B->C; determine the likelihood of this project will be completed in 18 weeks.

a.35%

b.20%

c.50%

d.99.85%