statistics and probablity crossword puzzle

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Across
  1. 2. Spread of values.
  2. 6. Arithmetic average.
  3. 8. Close to the actual.
  4. 10. Range of values.
  5. 11. Degree of certainty.
  6. 12. Subset of a larger group.
  7. 17. Serving as a widely used measure.
  8. 18. Established principle.
  9. 20. Extent or magnitude.
  10. 22. Extent of data dispersion.
  11. 23. Bell-shaped curve.
  12. 24. Difference from the true value.
  13. 27. Without end or limit.
  14. 28. Core or most important part.
  15. 29. Middle or typical value.
  16. 31. Single value estimate.
  17. 32. Predicted average value.
  18. 33. Having a limited number.
  19. 35. Plural of average.
  20. 37. Of considerable size.
  21. 38. Drawing conclusions from data.
  22. 39. Statistic used to guess a parameter.
Down
  1. 1. Fair, without systematic error.
  2. 3. By chance.
  3. 4. Testable statement.
  4. 5. Selecting a subset.
  5. 7. Done multiple times.
  6. 9. Not influenced by others.
  7. 13. Entire group of interest.
  8. 14. Population characteristic.
  9. 15. Form or outline.
  10. 16. Collected data points.
  11. 19. Approaching a limit as size grows.
  12. 21. Made larger.
  13. 22. Sample characteristic.
  14. 25. Returning after selection.
  15. 26. Proven mathematical statement.
  16. 30. Theoretical value approached.
  17. 34. Made smaller.
  18. 36. Tendency to differ or disperse.