Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    11
    ReputationRep:
    When comparing Box Plots:

    I know what it means if the IQR is bigger (the content is less consistent), but what does it mean if the Range is bigger. My book says that they mean the same thing, but sometimes the IQR and Range differ (e.g one box having a higher IQR, while having a lower R)

    Please help, I can't find this online, it's so dumb it's making me angry.
    Offline

    10
    ReputationRep:
    (Original post by solar222222)
    When comparing Box Plots:

    I know what it means if the IQR is bigger (the content is less consistent), but what does it mean if the Range is bigger. My book says that they mean the same thing, but sometimes the IQR and Range differ (e.g one box having a higher IQR, while having a lower R)

    Please help, I can't find this online, it's so dumb it's making me angry.
    The Lowest Value = Lowest data shown
    The Highest Value = Highest Data Shown
    The Range = The amount between the lowest value and the highest value.
    Upper Quartile = 75% of the range + Lower Value
    Lower Quartile = 25% of the range + Lower Value
    Interquartile Range = The amount between the Lower Quartile and the Upper Quartile
    Median = 50% of the range + Lowest Value


    Hopefully this makes sense ! It's hard to describe it without the example! Could you post the example on here?
    • Thread Starter
    Offline

    11
    ReputationRep:
    Hopefully this makes sense ! It's hard to describe it without the example! Could you post the example on here?[/QUOTE]

    Of course.

    Say we have 2 Box Plots, one that shows the information about the weight guessed by the boys, and the other represents the girls. Compare the two:

    - Girls have a larger median, so the guessed heavier weights.
    - Girls have a smaller IQR, so there is less variation in their guesses.
    - Girls have a bigger range....What do I say here?
    Offline

    10
    ReputationRep:
    (Original post by solar222222)
    Hopefully this makes sense ! It's hard to describe it without the example! Could you post the example on here?
    Of course.

    Say we have 2 Box Plots, one that shows the information about the weight guessed by the boys, and the other represents the girls. Compare the two:

    - Girls have a larger median, so the guessed heavier weights.
    - Girls have a smaller IQR, so there is less variation in their guesses.
    - Girls have a bigger range....What do I say here?[/QUOTE]

    If there is a bigger median, it means that girls are heavier on average.

    If there is a smaller IQR, it means that the girls weights tend to be the same so yes, less variation and difference in weight.

    If there is a bigger range, it means that there is more variety in girls weights than in boys weights.

    Hope this helps!?
    • Thread Starter
    Offline

    11
    ReputationRep:
    So they have both less and more variation? That makes no sense.I'm sorry, I'm still confused and it's driving me crazy.My book is treating it as if every time the IQR and Range are always the same (as in they both bigger or small than the other box plot). But I've had cases where they've been different and it's cost me the exam
    • Thread Starter
    Offline

    11
    ReputationRep:
    [QUOTE=solar222222;65367053]

    So they have both less and more variation? That makes no sense.I'm sorry, I'm still confused and it's driving me crazy.

    My book is treating it as if every time the IQR and Range are always the same (as in they both bigger or small than the other box plot). But I've had cases where they've been different and it's cost me the exam........
    Offline

    9
    ReputationRep:
    (Original post by solar222222)
    When comparing Box Plots:

    I know what it means if the IQR is bigger (the content is less consistent), but what does it mean if the Range is bigger. My book says that they mean the same thing, but sometimes the IQR and Range differ (e.g one box having a higher IQR, while having a lower R)

    Please help, I can't find this online, it's so dumb it's making me angry.
    If you done the maths paper recently no point doing that **** now lmao aint coming again
    • Thread Starter
    Offline

    11
    ReputationRep:
    (Original post by junayd1998)
    If you done the maths paper recently no point doing that **** now lmao aint coming again
    Oh, is that how it works, do they not repeat? Well that sucks.
    Offline

    9
    ReputationRep:
    (Original post by solar222222)
    Oh, is that how it works, do they not repeat? Well that sucks.
    It wont come trust me loool revise histograms, cumtalive frequency and frequency poloygons.
    • Thread Starter
    Offline

    11
    ReputationRep:
    (Original post by junayd1998)
    It wont come trust me loool revise histograms, cumtalive frequency and frequency poloygons.
    Thank you! =D

    Anything else? They probably won't make us use compasses again, can't really remember much else (and I also only got to question 17, I didn't do so good)
    Offline

    9
    ReputationRep:
    (Original post by solar222222)
    Thank you! =D

    Anything else? They probably won't make us use compasses again, can't really remember much else (and I also only got to question 17, I didn't do so good)
    Your welcome here is a full calc topic list https://www.mathswatchvle.com/docs/P...dexcel2016.pdf

    I think i scraped 70 marks barely
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Has a teacher ever helped you cheat?
    Useful resources

    Make your revision easier

    Maths

    Maths Forum posting guidelines

    Not sure where to post? Read the updated guidelines here

    Equations

    How to use LaTex

    Writing equations the easy way

    Student revising

    Study habits of A* students

    Top tips from students who have already aced their exams

    Study Planner

    Create your own Study Planner

    Never miss a deadline again

    Polling station sign

    Thinking about a maths degree?

    Chat with other maths applicants

    Can you help? Study help unanswered threads

    Groups associated with this forum:

    View associated groups
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Write a reply...
    Reply
    Hide
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.