Posted by **Nicole** on Tuesday, September 28, 2010 at 10:46am.

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