The Downtown Parking Authority of Tampa, Florida, 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
|
$ 3.00
|
|
2
|
38
|
6.00
|
|
3
|
53
|
9.00
|
|
4
|
45
|
12.00
|
|
5
|
40
|
14.00
|
|
6
|
13
|
16.00
|
|
7
|
5
|
18.00
|
|
8
|
36
|
20.00
|
|
250
|
|
a. Convert the information on the number of hours parked to a probability distribution. Is this a discrete or a continuous probability distribution?
b. Find the mean and the standard deviation of the number of hours parked. How would you answer the question: How long is a typical customer parked?
c. Find the mean and the standard deviation of the amount charged.