Question

The Bald Eagle is the national symbol of the United States and is found all over North America. The wingspan of bald eagles can be modelled by a normal distribution with mean 2.09 meters and standard deviation 0.08 meters.

The Southern Royal Albatross is a large seabird. They are one of the popular tourist attractions in the Otago Peninsula near Dunedin, NZ. The wingspan of southern royal albatrosses can be modelled by a normal distribution with mean 3.11 meters and standard deviation 0.063 meters.

During their trip to the US, Charles, William, and Harry spot a bald eagle called Baldy with a wingspan of 2.14 meters and during their NZ trip they spot a royal albatross called Alby with a wingspan of 3.18 meters.

Round all numeric answers to four decimal places.

5. What percentage of bald eagles have wingspan less than 2.1 meters?  %

6. What is the cutoff for the smallest 25% of royal albatrosses wingspans?  meters

7. What is the wingspan for a royal albatross with a wingspan at the 80 percentile?  meters

Answer 1

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