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The box-and-whisker plot below shows the numbers of text messages received in one day by students in the seventh and eighth grades at Lincoln Middle School. Two box and whisker plots are shown above a number line. The number line is scaled from 2 to 38 by twos. The first plot above the number line is labeled seventh grade. On the seventh grade plot: The left point is at 6. The left side of the box is at 14. The vertical segment inside the box is at 18 . The right side of the box is at 22. The right point of the plot is at 26. The eighth grade plot is above the seventh grade plot. On the eighth grade plot: The left point is at 22. The left side of the box is at 26. the vertical segment inside the box is at 30. The right side of the box is at 34. The right point of the plot is at 38.
a) Describe the overlap of the two sets of data.

b) Find the IQR of each set.

c) Find the difference between the medians of the sets.

d) What number multiplied by the IQR equals the difference between the medians of the two sets?

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Gianna

  1. a) The ranges of the two sets of data overlap by 4.
    The upper quartile of the 7th grade data equals the lowest value of the 8th grade data.
    The highest value of the 7th grade data equals the lower quartile of the 8th grade data.

    b) IQR of the 7th grade data = 22 - 14 = 8
    IQR of the 8th grade data = 34 - 26 = 8

    c) median difference = 30 - 18 = ____

    d) 8*x = answer to c)
    x = ____

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    plumpycat

  2. (On part D) if you do 12÷8 you get 1.5

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    Hallie

  4. That was very wrong and I will ask you never to say anything like that ever again, thank you.

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    1Strike

  5. i just need the freaking answer

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    shakira

  6. so what's the answer?

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    zzinnya

  8. It was above they did a great job of explaining it.

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    TrYharD

  9. A: The overlap of the two sets is 2.2 which is the differences of the medians divided by the IQR . B: The IQR of the two sets is 8. C: The difference of the two medians is 22. D: The number is 2.2. hope this helps.

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    kim

  10. D) 8 * 1.5 = The differrence which is 12.
    You can test this by adding 12 to the 1st median, which is 18. That gives us 30, which is the second median. This proves that the difference between the two medians is 12. Remember, 8 is the IQR, so IQR * 1.5 = 12.

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    Anonymous

  12. are these the right anwsers

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    brooklynn

  13. I don't think so.... but I need the answers so bad!!!!!!!!!!!!! I am taking these answers. But if their wrong..... I'm gonna get soooooooooo mad!

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    Help:(

  14. What's the answere for D

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    Unicorns

  16. thx

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    1 + 1 is 3

  17. A is 24-26
    B is 8th 10 and 7th 12
    C is 2
    D is .2 I think

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    I think

  18. 8th is 35-25 witch is 10
    7th is 23-11 witch is 12
    And 12-10=2

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    I think

  20. Isn’t Q1 10 and Q3
    22

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    Anonymous

  21. Shut UP

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    Thez nuts

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