Hey there! Sign in to join this conversationNew here? Join for free

S1 Alevel - Histograms Watch

Announcements
    • Thread Starter
    Offline

    2
    ReputationRep:
    Can someone just explain to me this K value involved in histograms.

    I have just been used to the frequency = cw x FD

    But now you have to factor in a K value. I dont think the EDEXEL S1 book explains it very well....

    Thanks
    Offline

    3
    ReputationRep:
    (Original post by christinajane)
    Can someone just explain to me this K value involved in histograms.

    I have just been used to the frequency = cw x FD

    But now you have to factor in a K value. I dont think the EDEXEL S1 book explains it very well....

    Thanks
    K is generally the constant we factor in when we want to equate an expression of proportionality. The area of the histogram (i.e. CW x FD) is proportional to the frequency.

    i.e. Area α Frequency.
    We just introduce K such that: Area = k x Frequency

    You will come across a question where you have to calculate the frequency and it turns out that multiplying CW by FD doesn't give you it. That's where K comes in.
    • Thread Starter
    Offline

    2
    ReputationRep:
    (Original post by RMNDK)
    K is generally the constant we factor in when we want to equate an expression of proportionality. The area of the histogram (i.e. CW x FD) is proportional to the frequency.

    i.e. Area α Frequency.
    We just introduce K such that: Area = k x Frequency

    You will come across a question where you have to calculate the frequency and it turns out that multiplying CW by FD doesn't give you it. That's where K comes in.
    Ha yeah - was just doing some questions from the book and I couldnt figure out why CW X FD didnt equal the frequency as it does when you do histogram questions in GCSE.

    I really dont think the book explains it very well....unless Im just very stupid! Probably the latter...
 
 
 
  • 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
    Should Spain allow Catalonia to declare independence?
    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

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