Exhibit 12-6 The Owner of a Car Wash Wants to See If

Multiple Choice

Exhibit 12-6
The owner of a car wash wants to see if the arrival rate of cars follows a Poisson distribution. In order to test the assumption of a Poisson distribution, a random sample of 150 ten-minute intervals was taken. You are given the following observed frequencies:
-Refer to Exhibit 12-6. The calculated value for the test statistic equals

A) -0.18
B) 0.18
C) 1.72
D) 2.89