In: Math
The Downtown Parking Authority of Tampa, Florida, reported the following information for a sample of 220 customers on the number of hours cars are parked and the amount they are charged.
| Number of Hours | Frequency | Amount Charged | |||
| 1 | 15 | $ | 2 | ||
| 2 | 36 | 6 | |||
| 3 | 53 | 9 | |||
| 4 | 40 | 13 | |||
| 5 | 20 | 14 | |||
| 6 | 11 | 16 | |||
| 7 | 9 | 18 | |||
| 8 | 36 | 22 | |||
| 220 | |||||
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Solution:

a-1. Convert the information on the number of hours parked to a probability distribution.
Answer:

Find the mean and the standard deviation of the number of hours parked.


How long is a typical customer parked?
Answer: 
Find the mean and the standard deviation of the amount charged.

