Mathematics, 16.02.2021 14:00 liliauedt
The Grand Canyon and the Colorado River are beautiful, rugged, and sometimes dangerous. Thomas Myers is a physician at the park clinic in Grand Canyon Village. Dr. Myers has recorded (for a 5-year period) the number of visitor injuries at different landing points for commercial boat trips down the Colorado River in both the Upper and Lower Grand Canyon (Source: Fateful Journey by Myers, Becker, Stevens).
Upper Canyon:
Number of Injuries per Landing Point Between North Canyon and Phantom Ranch
2 ,3 ,1 ,1 ,3 ,4 ,6 ,9 ,3 ,1 ,3
Lower Canyon:
Number of Injuries per Landing Point Between Bright Angel and Lava Falls
8 , 1 ,1 , 0, 6 ,7, 2 ,14 ,3, 0 ,1 , 13 , 2 , 1
Answer the following questions based on the above data
Find the probability of happening more than 8 injuries in upper Canyon if one landing point is selected randomly ? (1 MARK)
8) Find the probability of happening more than 8 injuries in Lower Canyon if one landing point is selected randomly? (1 MARK)
9) Compare the probabilities in questions 7 and 8 and decide which area is more secure.
(1 MARK)
10) Find out the absolute values of differences of the number of injuries of Upper Canyon from its median and find the average of the resulting values .(Correct to one decimal place )
(1 MARK)
Answers: 2
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