Question

The parking authority in downtown Halifax reported the following information for a sample of 250 customers on the number of hours cars are parked and the amount they are charged:

Number of Hours	Frequency	Amount Charged
1	20	$3
2	38	6
3	53	9
4	45	12
5	40	14
6	13	16
7	5	18
8	36	20
Total	250

a-1. Convert the information on the number of hours parked to a probability distribution. (Round the final answers to 3 decimal places.)

Hours	Probability
1
2
3
4
5
6
7
8

a-2. Is this a discrete or a continuous probability distribution?

(Click to select)  Continuous  Discrete

b-1. Find the mean and the standard deviation of the number of hours parked. (Round the final answers to 3 decimal places.)

Mean           

Standard deviation           

b-2. How would you answer the question, how long is a typical customer parked? (Round the final answer to 3 decimal places.)

The typical customer is parked for  hours.

c. Find the mean and standard deviation of the amount charged. (Round the final answers to 2 decimal places.)

Mean           

Standard deviation           

Answer 1

a1  

Hrs	Probty	amt charged Y
1	20/250 = 0.08	3
2	0.152	6
3	0.212	9
4	0.180	12
5	0.160	14
6	0.052	16
7	0.020	18
8	0.144	20

a-2 This is Discrete distribution.

b-1