Question 1105924
Number of Hours	Frequency	Amount Charged
1	           15	               $2
2	           38	                5
3	           50	                9
4	           45	               13
5	           20	               14
6	           16	               16
7	            5	               18
8	           36	               20
                  225	


a-1. Convert the information on the number of hours parked to a probability distribution. (Round your answers to 3 decimal places.) 
Hours / Probability
1/ 15/225
 2/ 38/225
 3/ 50/225
et cetera
.?
.?
8.?


a-2. Is this a discrete or a continuous probability distribution 
()Discrete:: yes
()Continuous 

b-1. Find the mean and the standard deviation of the number of hours parked. (Do not round the intermediate calculations. Round your final answers to 3 decimal places.) 
Multiply (# of hours) times (frequency)
Add those products
Divide by the sum of the frequencies to get the mean.
I'll leave the standard deviation to you.

b-2. How long is a typical customer parked? (Do not round the intermediate calculations. Round your final answer to 3 decimal places.)
That is the mean of b-1 

c. Find the mean and the standard deviation of the amount charged. (Do not round the intermediate calculations. Round your final answers to 3 decimal places.)
Multiply (cost per hour) times (frequency)
Add those products
Divide by the sum of the frequencies.
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Cheers,
Stan H.
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