Bison Queries

Answers to the following questions can be found in the bison database. Questions increase in difficulty from one to seven. At the end of each question there is a link to the bison database and a link to the answer. There may also be a link to a hint. Try to first answer the question using the database, and then click to see if you are correct.

1. How many calves were born each year from 2000 to 2007?



2. How did the herd size change each year from 2000 to 2007?



3. What is the age in 2003 of the oldest cow whose birth date is known? In 2004?



4. How many cows were of breeding age each year from 2000 to 2007?



5. How many calves on average were born to cows of breeding age in each year?



6. What percentage of breeding age cows had calves in each breeding season?



7. How many animals were removed from the herd (were sold, traded or died) in each year since 2001-2002?



8. Can you think of possible explanations for some of the changes in the above data? Which of these factors would influence each of the above data sets?

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