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  
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a1. Convert the information on the number of hours parked to a probability distribution. (Round your answers to 3 decimal places.)
a2. Is this a discrete or a continuous probability distribution?
b1. Find the mean and the standard deviation of the number of hours parked.
b2. How long is a typical customer parked? (Round your answer to 3 decimal places.)
Find the mean and the standard deviation of the amount charged. (Round your answers to 2 decimal places.)
Given information:
Sample size (n) = 250
The number of hours cars are parked and the amount they are charged is:
Table 1
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 
Total  250 

a1
Explanation:
Let x is a random variable of hours car are parked.
The probability formula for each frequency is:
Here, N is population size and f is frequency.
Convert the information on the number of hou...
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