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anonymous

  • one year ago

Could somebody help me with a Stem & Leaf plot problem? I just suck at these.

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  1. anonymous
    • one year ago
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  2. anonymous
    • one year ago
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    I think it's either B or D.

  3. jim_thompson5910
    • one year ago
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  4. jim_thompson5910
    • one year ago
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    Are you able to find the median of this data set? {0, 0, 5, 8 12, 13, 15, 18, 18, 19 22, 24, 26, 27, 27, 27 33, 35, 36 42, 44, 46 57}

  5. anonymous
    • one year ago
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    Are you suppose to ignore the zeros or not?

  6. anonymous
    • one year ago
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    @jim_thompson5910

  7. jim_thompson5910
    • one year ago
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    no do not ignore the 0s

  8. jim_thompson5910
    • one year ago
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    they are part of the data set

  9. anonymous
    • one year ago
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    Then the median is 26.

  10. jim_thompson5910
    • one year ago
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    close but no

  11. anonymous
    • one year ago
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    Oh, 24. My bad. :)

  12. jim_thompson5910
    • one year ago
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    yep

  13. jim_thompson5910
    • one year ago
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    what is the mode?

  14. anonymous
    • one year ago
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    27

  15. jim_thompson5910
    • one year ago
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    so "the median is greater than the mode" is false

  16. jim_thompson5910
    • one year ago
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    what is the range of this data set?

  17. anonymous
    • one year ago
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    57

  18. anonymous
    • one year ago
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    so B is wrong.

  19. jim_thompson5910
    • one year ago
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    yep 57 is the correct range, not 52

  20. jim_thompson5910
    • one year ago
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    if you break up the data set into two halves, you'll find that the lower or left half is 0, 0, 5, 8, 12, 13, 15, 18, 18, 19, 22 what is the median of this data set shown above?

  21. anonymous
    • one year ago
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    13

  22. jim_thompson5910
    • one year ago
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    good

  23. jim_thompson5910
    • one year ago
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    the median of the lower/left half of the data is exactly equal to the value of Q1 Q1 = first quartile

  24. jim_thompson5910
    • one year ago
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    so C is right. How about D?

  25. anonymous
    • one year ago
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    That's one of the things I'm having trouble with. I can't figure out which graphs are symmetrical and which aren't.

  26. jim_thompson5910
    • one year ago
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    where is the median? what value is it?

  27. anonymous
    • one year ago
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    The median is in the middle and it's 24.

  28. jim_thompson5910
    • one year ago
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    well if this data set was perfectly symmetrical, then you would have a mirror like quality of the data values. The mirror itself would be at the median, aka the middle

  29. jim_thompson5910
    • one year ago
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    but notice how we have one lone outlier at 57 in contrast, we have a bunch of values clumped around the single digits (0, 0, 5, 8) and then a bunch more in the teens (12, 13, etc etc). So there are a lot more data values on the left side end, compared to the right end

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