Mean, Mode, Median

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Across
  1. 5. Subtracting smallest number from largest number in a set of numbers
  2. 7. The measure of the surface of a shape inside the "fence."
  3. 8. A name for all of the numbers together
  4. 9. The smallest number in a set of numbers
  5. 12. The measure around the outside of a shape(Fence)
Down
  1. 1. Middle number in a set of numbers
  2. 2. A four-sided shape with four right angles & equal sides
  3. 3. A shape with 3 sides
  4. 4. A four-sided shape with 4 right angles
  5. 6. The greatest number in a set of numbers
  6. 10. It's 4 in 1, 2, 4, 4, 4, 5
  7. 11. Another name for "mean"
  8. 13. Add all of the numbers together and then divide by the sum of how many numbers there are