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 expected frequency of exactly 3 cars arriving in a 10-minute interval is

A) 0.1533
B) 0.1743
C) 23
D) 26.145