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Inter quartile range

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Inter quartile range

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Inter quartile range

  1. 1. Interquartile Range Conceptual Explanation Interquartile Range
  2. 2. Interquartile Range The interquartile range represents the distance between the 25th percentile and 75th percentile. Interquartile Range
  3. 3. Interquartile Range The interquartile range represents the distance between the 25th percentile and 75th percentile. 1 2 3 4 5 6 7 8 9 1 2 3 4 5 Interquartile Range
  4. 4. Interquartile Range The interquartile range represents the distance between the 25th percentile and 75th percentile. 1 2 3 4 5 6 7 8 9 1 2 3 4 5 25th percentile Interquartile Range
  5. 5. Interquartile Range The interquartile range represents the distance between the 25th percentile and 75th percentile. 50th percentile 1 2 3 4 5 6 7 8 9 1 2 3 4 5 25th percentile Interquartile Range
  6. 6. Interquartile Range The interquartile range represents the distance between the 25th percentile and 75th percentile. 50th percentile 1 2 3 4 5 6 7 8 9 1 2 3 4 5 25th percentile This is called the MEDIAN Interquartile Range
  7. 7. Interquartile Range The interquartile range represents the distance between the 25th percentile and 75th percentile. 50th percentile 1 2 3 4 5 6 7 8 9 1 2 3 4 5 25th percentile 75th percentile Interquartile Range
  8. 8. Interquartile Range The interquartile range represents the distance between the 25th percentile and 75th percentile. 50th percentile 1 2 3 4 5 6 7 8 9 1 2 3 4 5 25th percentile 75th percentile This means that 25% of the scores fall below this point. Interquartile Range
  9. 9. Interquartile Range The interquartile range represents the distance between the 25th percentile and 75th percentile. 50th percentile 1 2 3 4 5 6 7 8 9 1 2 3 4 5 25th percentile 75th percentile This means that 25% of the scores fall below this point. This means that 75% of the scores fall below this point. Interquartile Range
  10. 10. Interquartile Range The interquartile range represents the distance between the 25th percentile and 75th percentile. 1 2 3 4 5 6 7 8 9 1 2 3 4 5 25th percentile 75th percentile Interquartile Range
  11. 11. Interquartile Range The interquartile range represents the distance between the 25th percentile and 75th percentile. 1 2 3 4 5 6 7 8 9 1 2 3 4 5 25th percentile 75th percentile Interquartile Range
  12. 12. Interquartile Range The interquartile range represents the distance between the 25th percentile and 75th percentile. 1 2 3 4 5 6 7 8 9 1 2 3 4 5 25th percentile 75th percentile 50% of the scores fall between these two points Interquartile Range
  13. 13. Interquartile Range The interquartile range represents the distance between the 25th percentile and 75th percentile. 1 2 3 4 5 6 7 8 9 1 2 3 4 5 25th percentile 75th percentile 50% of the scores fall between these two points This is the Interquartile Range! Interquartile Range
  14. 14. Purposes of the Interquartile Range (IQR) Interquartile Range
  15. 15. Purposes of the Interquartile Range (IQR) The Interquartile Range (IQR) is a helpful measure of spread for two scenarios. Interquartile Range
  16. 16. Purposes of the Interquartile Range (IQR) The Interquartile Range (IQR) is a helpful measure of spread for two scenarios. 1. Rank ordered Data Interquartile Range
  17. 17. Purposes of the Interquartile Range (IQR) The Interquartile Range (IQR) is a helpful measure of spread for two scenarios. 1. Rank ordered Data 9t 8t 7t 7t 5t 6t 6t 5t 4t 6t 5t 5t 3d 2d 1st 1 2 3 4 5 6 7 8 9 1 2 3 4 5 3d4t 4t Interquartile Range
  18. 18. Purposes of the Interquartile Range (IQR) The Interquartile Range (IQR) is a helpful measure of spread for two scenarios. 1. Rank ordered Data 9t 8t 7t 7t 5t 6t 6t 5t 4t 6t 5t 5t 3d 2d 1st 1 2 3 4 5 6 7 8 9 1 2 3 4 5 3d4t 4t First Interquartile Range
  19. 19. Purposes of the Interquartile Range (IQR) The Interquartile Range (IQR) is a helpful measure of spread for two scenarios. 1. Rank ordered Data 9t 8t 7t 7t 5t 6t 6t 5t 4t 6t 5t 5t 3d 2d 1st 1 2 3 4 5 6 7 8 9 1 2 3 4 5 3d4t 4t FirstLast Interquartile Range
  20. 20. Purposes of the Interquartile Range (IQR) The Interquartile Range (IQR) is a helpful measure of spread for two scenarios. 1. Rank ordered Data 2. Highly Skewed Data Interquartile Range
  21. 21. Purposes of the Interquartile Range (IQR) The Interquartile Range (IQR) is a helpful measure of spread for two scenarios. 1. Rank ordered Data 2. Highly Skewed Data 1 2 3 3 5 4 4 5 6 4 5 5 7 7 22 23 1 2 3 4 5 6 7 23 1 2 3 4 5 6 6 22 Interquartile Range
  22. 22. Purposes of the Interquartile Range (IQR) The Interquartile Range (IQR) is a helpful measure of spread for two scenarios. 1. Rank ordered Data 2. Highly Skewed Data 1 2 3 3 5 4 4 5 6 4 5 5 7 7 22 23 1 2 3 4 5 6 7 23 1 2 3 4 5 6 6 22 Mean = 7 Median = 5 Interquartile Range
  23. 23. Purposes of the Interquartile Range (IQR) The Interquartile Range (IQR) is a helpful measure of spread for two scenarios. 1. Rank ordered Data 2. Highly Skewed Data 1 2 3 3 5 4 4 5 6 4 5 5 7 7 22 23 1 2 3 4 5 6 7 23 1 2 3 4 5 6 6 22 IQR Interquartile Range
  24. 24. Purposes of the Interquartile Range (IQR) The Interquartile Range (IQR) is a helpful measure of spread for two scenarios. 1. Rank ordered Data 2. Highly Skewed Data 1 2 3 3 5 4 4 5 6 4 5 5 7 7 22 23 1 2 3 4 5 6 7 23 1 2 3 4 5 6 6 22 IQR Standard Deviation = 5.3 Interquartile Range
  25. 25. Purposes of the Interquartile Range (IQR) The Interquartile Range (IQR) is a helpful measure of spread for two scenarios. 1. Rank ordered Data 2. Highly Skewed Data 1 2 3 3 5 4 4 5 6 4 5 5 7 7 8 9 1 2 3 4 5 6 7 1 2 3 4 5 6 6 IQR 8 9 Standard Deviation = 2.3 Notice how the Standard Deviation drops from 5.3 to 2.3. Interquartile Range
  26. 26. Purposes of the Interquartile Range (IQR) The Interquartile Range (IQR) is a helpful measure of spread for two scenarios. 1. Rank ordered Data 2. Highly Skewed Data 1 2 3 3 5 4 4 5 6 4 5 5 7 7 8 9 1 2 3 4 5 6 7 1 2 3 4 5 6 6 IQR 8 9 Standard Deviation = 2.3 Notice how the Standard Deviation drops from 5.3 to 2.3. However the IQR stays the same. Interquartile Range
  27. 27. The End Interquartile Range

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