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:
|
Number of Cars Arriving in a 10-Minute Interval
|
Frequency
|
|
0
|
3
|
|
1
|
10
|
|
2
|
15
|
|
3
|
23
|
|
4
|
30
|
|
5
|
24
|
|
6
|
20
|
|
7
|
13
|
|
8
|
8
|
|
9
|
4
|
|
Total
|
150
|
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