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Sample and population standard deviation

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Problem

You have found the following ages (in years) of all 4 bears at your local zoo:
5,4,6,39
What is the average age of the bears at your zoo? What is the standard deviation? Round your answers to the nearest tenth.
Average age:
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi
years old
Standard deviation:
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi
years
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