When parking a car in a downtown parking lot, drivers pay according to the number of hours or fraction thereof. The probability distribution of the number of hours cars are parked has been estimated as follows:

X 1 2 3 4 5 6 7 8
P(X) 0.229 0.122 0.105 0.086 0.069 0.033 0.024 0.332
find the Standard Deviation ,and then The cost of parking is 2.25 dollars per hour. Calculate the mean and standard deviation of the amount of revenue each car generates, find the The cost of parking is 2.25 dollars per hour find the standard deviation of the amount of revenue each car generates.

Question

When parking a car in a downtown parking lot, drivers pay according to the number of hours or fraction thereof. The probability distribution of the number of hours cars are parked has been estimated as follows: 


X 1 2 3 4 5 6 7 8 
P(X) 0.229 0.122 0.105 0.086 0.069 0.033 0.024 0.332 
find the Standard Deviation ,and then The cost of parking is 2.25 dollars per hour. Calculate the mean and standard deviation of the amount of revenue each car generates, find the The cost of parking is 2.25 dollars per hour find the standard deviation of the amount of revenue each car generates.

anonymous · Answer

Oh how I love WeBWorK friday nights. Am I right?

vishal_kothari · Answer

http://answers.yahoo.com/question/index?qid=20110517120658AAsRfCl

anonymous · Answer

yes， you are totally right