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- 1. These are Abby’s science test scores. 97 84 73 88 100 63 97 95 86
- 2. What can you tell us about these numbers? 97 84 73 88 100 63 97 95 86
- 3. What is the MEAN? How do we find it? The mean is the numerical average of the data set. The mean is found by adding all the values in the set, then dividing the sum by the number of values.
- 4. Lets find Abby’s MEAN science test score? 97 84 73 88 100 63 97 95 86 + 783 783 ÷ 9 The mean is 87
- 5. What is the MEDIAN? How do we find it? The MEDIAN is the number that is in the middle of a set of data 1. Arrange the numbers in the set in order from least to greatest. 2. Then find the number that is in the middle.
- 6. 978473 88 10063 979586 The median is 88. Half the numbers are less than the median. Half the numbers are greater than the median.
- 7. Median Sounds like MEDIUM Think middle when you hear median.
- 8. How do we find the MEDIAN when two numbers are in the middle? 1. Add the two numbers. 2. Then divide by 2.
- 9. 978473 88 10063 9795 88 + 95 = 183 183 ÷ 2 The median is 91.5
- 10. What is the MODE? How do we find it? The MODE is the piece of data that occurs most frequently in the data set. A set of data can have: • One mode • More than one mode • No mode
- 11. 978473 88 10063 979586 The value 97 appears twice. All other numbers appear just once. 97 is the MODE
- 12. A Hint for remembering the MODE… The first two letters give you a hint… MOde Most Often
- 13. Which set of data has ONE MODE? 9, 11, 16, 8, 16 9, 11, 16, 6, 7, 17, 18 18, 7, 10, 7, 18 A C B
- 14. Which set of data has NO MODE? 13, 12, 12, 11, 12 9, 11, 16, 6, 7, 17, 18 18, 7, 10, 7, 18 A C B
- 15. Which set of data has MORE THAN ONE MODE? 9, 11, 16, 8, 16 9, 11, 16, 6, 7, 17, 18 18, 7, 10, 7, 18 A C B
- 16. What is the RANGE? How do we find it? The RANGE is the difference between the lowest and highest values.
- 17. 978473 8863 979586 97 -63 34 34 is the RANGE or spread of this set of data
- 18. What is the RANGE of this set of data? 84 71 88 99 48 97 86
- 19. What is the RANGE of this set of data? 8471 88 9948 9786 99 -48 51
- 20. What is the RANGE of this set of data? 33 67 85 17 48 15 46
- 21. What is the RANGE of this set of data? 85 -15 70 33 67 8517 4815 46
- 22. What is the RANGE of this set of data? 267 119 357 401 329 483227
- 23. What is the RANGE of this set of data? 267119 357 401329 483227 483 -119 364
- 24. This one is the requires more work than the others. Right in the MIDDLE. This one is the easiest to find— Just LOOK.
- 25. Find the….
- 26. Find the….
- 27. Find the….
- 28. Find the….
- 29. Find the….

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