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rainbow_rocks03

  • one year ago

3RD ONE. For the data shown in the stem-and-leaf plot, what is the effect on the mean and median of adding the value 20 to the data set? A. The mean is decreased by about 0.1 and the median is decreased by 2. B. The mean is decreased by about 0.1 and the median is decreased by 3. C. The mean is decreased by about 0.15 and the median is decreased by 2. D. The mean is decreased by about 0.15 and the median is decreased by 3.

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  1. Black_ninja123
    • one year ago
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    What do you think the answer is?

  2. rainbow_rocks03
    • one year ago
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    umm...

  3. rainbow_rocks03
    • one year ago
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    A?

  4. Black_ninja123
    • one year ago
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    do the mean without adding the extra 20 and when you get the answer than do it again with the extra 20 and see the difference and its not A

  5. rainbow_rocks03
    • one year ago
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    IDK what the answer is.

  6. Black_ninja123
    • one year ago
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    its D

  7. rainbow_rocks03
    • one year ago
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    how?

  8. Black_ninja123
    • one year ago
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    When you do the mean without the 20 its 22.56 and when you do it with the extra 20 its 22.41 22.56-22.41=0.15 so it can't be a or b

  9. rainbow_rocks03
    • one year ago
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    oh I think I understand

  10. Black_ninja123
    • one year ago
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    And when you do the mean you get 23 but if you add the extra 20 you get 20 20-23=3

  11. Black_ninja123
    • one year ago
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    so D

  12. Black_ninja123
    • one year ago
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    Sorry i'm really horrible at explaining stuff

  13. rainbow_rocks03
    • one year ago
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    it's okay

  14. rainbow_rocks03
    • one year ago
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    thx

  15. Black_ninja123
    • one year ago
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    Np

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