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: At the .05 level of significance, the conclusion of the test is that the
A) null hypothesis cannot be rejected.
B) arrival of cars does not follow a Poisson distribution.
C) 10-minute intervals follow a Poisson distribution.
D) arrival of cars has no distribution.

Question

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:  ​ At the .05 level of significance, the conclusion of the test is that the
A) null hypothesis cannot be rejected. 
B) arrival of cars does not follow a Poisson distribution. 
C) 10-minute intervals follow a Poisson distribution. 
D) arrival of cars has no distribution.

Quizplus · Accepted Answer

The Answer of 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:  ​ At the .05 level of significance, the conclusion of the test is that the
A) null hypothesis cannot be rejected. 
B) arrival of cars does not follow a Poisson distribution. 
C) 10-minute intervals follow a Poisson distribution. 
D) arrival of cars has no distribution.

The Owner of a Car Wash Wants to See If