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Exercise 6-8

The Downtown Parking Authority of Tampa, Florida, reported the following information for a sample of 235 customers on the number of hours cars are parked and the amount they are charged.

Number of Hours Frequency Amount Charged
1 18 $3
2 33 7
3 49 10
4 44 15
5 34 19
6 15 24
7 8 27
8 34 30
235



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(a) Convert the information on the number of hours parked to a probability distribution. (Round your answers to 3 decimal places.)
Hours Probability
1
2
3
4
5
6
7
8

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


(b-2) How long is a typical customer parked? (Round your answer to 3 decimal places.)
The typical customer is parked for hours


(c) Find the mean and the standard deviation of the amount charged. (Round your intermediate values and final answers to 3 decimal places.)
Mean
Standard deviation

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