Consider an experiment in which the number of pumps in use at each of two seven-pump gas stations was determined. Call the two gas stations Station A and Station B. Define rv's X, Y, and U by X

Answer: Determine the number of pumps in each of the two six-pump gas stations.

• X = the total No. of pumps that are in use at the 2 stations

• Y = the difference between the No. of pumps in utilization at station 1 and the

NO. of pumps in use at the station 2

• U = the max number of pumps in use at the 2 stations

W (observed) = (3, 4)

X (W) = 3 + 4 = 7

Y (W) = 3 - 4 = - 1

U (W) = max (3, 4) = 4