Thursday, July 30, 2009

Can someone help me with these questions please!!!!?

Question 4 (2 points)


Q3 - 4


An oil terminal can handle 10 tankers on any day and on average receives 7 per day. What are the expected number of days in a 365 day year that there will be too many tankers arriving for the terminal to deal with?





a. 19


b. 32


c. 0.071


d. 36


e. 0.012





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Question 5 (1 point)


Q3 - 5


What assumptions have you made in arriving at the answer given in question 4? Tick all that apply





a. That tankers are all of the same size


b. That tankers not handled immediately do not wait until the next day


c. That tankers arrive at random throughout the year


d. That tannkers arrive at regular times throughout the day


e. That tankers arrive individually and not as convoys





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Question 6 (1 point)


Q3 - 6


In a city in West Africa, which is subjected to a monsoon climate, it has been observed that it rains on average 160 days per annum. Why would it not be appropriate to use a Poisson distribution to determine the probability of it raining everyday for a week? Tick all that apply





a. The occurrences must be independent of each other


b. Rainy days cannot be expressed as the number of occurrences over some interval


c. Weather patterns are deterministic and probabilistic rules are inappropriate.


d. The occurrences must be uniformly distributed over the interval


e. The average rate of occurrences is too high for the Poisson distribution to be applicable





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Can someone help me with these questions please!!!!?
Question 5 has to be answered before 4.





Cos you can't answer 4 without making some assumptions.





Cos if the average of 7 arrive at one time and more arrive (above average) then you might eceed the 10 allowed.





If they all arrive one at a time throughout the day then you will probably never exceed the limit.





For the 10 to be full, you are assuming that they are all the same size as 12 small ones may not fill the yard...





So, (a) and (c) are definitely correct for number 5.
Reply:plz u ask 1 by 1


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