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Sample and population standard deviation

You have found the following ages (in years) of all 44 bears at your local zoo:
5,4,6,39\qquad5,\enspace 4,\enspace 6,\enspace 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:
years old
Standard deviation:
years