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anonymous

  • one year ago

anyone good with quartiles??? like with stem and leaf plots, and box and whisker plots??? i will fan and medal anyone who helps!! :)

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  1. anonymous
    • one year ago
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    i have two questions...but cant really figure them out...can someone help?? i will fan or medal or do both

  2. jim_thompson5910
    • one year ago
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    post your question

  3. anonymous
    • one year ago
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    k, one sec

  4. anonymous
    • one year ago
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    What is the first quartile (Q1) of the data set? 51, 42, 46, 53, 66, 70, 90, 70 48.5 59.5 61 70

  5. jim_thompson5910
    • one year ago
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    first off, you'll need to find the median. To do that, you sort the data from smallest to biggest and pick out the middle-most value

  6. jim_thompson5910
    • one year ago
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    |dw:1433220603820:dw|

  7. jim_thompson5910
    • one year ago
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    |dw:1433220620697:dw|

  8. jim_thompson5910
    • one year ago
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    |dw:1433220645867:dw|

  9. jim_thompson5910
    • one year ago
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    what median do you get?

  10. anonymous
    • one year ago
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    i got 46

  11. anonymous
    • one year ago
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    sorry wrong answer lol

  12. jim_thompson5910
    • one year ago
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    try again

  13. anonymous
    • one year ago
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    59.5 is my real answer that i got

  14. jim_thompson5910
    • one year ago
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    59.5 is the median, yes

  15. anonymous
    • one year ago
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    k whats the next step?

  16. jim_thompson5910
    • one year ago
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    what we do from here is cut the data set in half based on that median the first quartile will come from this data set circled |dw:1433221087759:dw| I have circled everything smaller than the median

  17. jim_thompson5910
    • one year ago
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    find the median of that subset, of this list of numbers 42, 46, 51, 53 to get the value of Q1

  18. jim_thompson5910
    • one year ago
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    |dw:1433221141622:dw|

  19. anonymous
    • one year ago
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    so 48.5?

  20. jim_thompson5910
    • one year ago
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    |dw:1433221173116:dw|

  21. jim_thompson5910
    • one year ago
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    48.5 is Q1, correct

  22. anonymous
    • one year ago
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    yay!!! can you help with one more...its for Q3

  23. jim_thompson5910
    • one year ago
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    sure

  24. anonymous
    • one year ago
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    k thanks! :)

  25. anonymous
    • one year ago
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    What is the third quartile (Q3) of the data set? 165, 85, 105, 105, 152, 144, 140, 160, 80 105 140 156 160

  26. jim_thompson5910
    • one year ago
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    you'll follow the same steps, but instead of focusing on the lower half, you do the upper half

  27. anonymous
    • one year ago
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    k, ill try and find the answer now....

  28. jim_thompson5910
    • one year ago
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    step 1) sort the data step 2) find the median step 3) circle the group of values larger than the median or to the right of it step 4) in this sub-group, find the median to get Q3

  29. anonymous
    • one year ago
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    i got 156...is that correct?

  30. jim_thompson5910
    • one year ago
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    Q3 = 156 is correct

  31. anonymous
    • one year ago
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    yay!! and thank you so much! you are very kind! :)

  32. jim_thompson5910
    • one year ago
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    glad to be of help

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