A16-6 Stem&Leaf, Average

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  • 1. Stem-and-Leaf Plots Algebra 1 6.6 p.368
  • 2. Stem-and-Leaf Plot
    • Arrangement of digits used to display and order data.
  • 3. Stem-and-Leaf Plot
    • All the “stems” are the first digits of the numbers.
  • 4. Stem-and-Leaf Plot
    • All the “stems” are the first digits of the numbers.
    • All the “leaves” are the second digits.
  • 5. Stem-and-Leaf Plot
    • All the “stems” are the first digits of the numbers.
    • All the “leaves” are the second digits.
      • These are listed with the other leaves of the same stem.
  • 6. Stem-and-Leaf Example (unordered)
  • 7. Stem-and-Leaf Example (ordered)
  • 8. Mean, Median, and Mode Algebra 1 6.6 p. 369
  • 9. Mean
    • Also called average.
  • 10. Mean
    • Add all the numbers together, then divide by how many numbers you have.
  • 11. Median
    • The middle number of all the numbers when the set is written in order.
  • 12. Median
    • The middle number of all the numbers when the set is written in order.
    • If there are two middle numbers, average those numbers.
  • 13. Mode
    • The numbers that occur most frequently.
  • 14. Mode
    • The numbers that occur most frequently.
    • A set can have no mode or more than one mode.
  • 15.  
  • 16. Mean, Median, and Mode
    • Sometimes the mean is more representative of the data.
    • Other times, especially if the data is very different, the median or mode is a better choice.