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

    10
    ReputationRep:
    Name:  Untitled.png
Views: 45
Size:  212.7 KB
    Can someone help me on this question please? like walk through it, because the mark scheme doesn't help at all. In all the worked solutions I've seen, the areas are found out using random numbers? I don't have a clue what to do. Thanks.

    (These are the solutions I'm talking about, Idk where the numbers are coming from)

    Question 8 on these:
    http://mathstallis.weebly.com/upload...prac_2h_ws.pdf
    http://homework.m34maths.com/files/d...-Solutions.pdf
    • Community Assistant
    • Study Helper
    Offline

    20
    ReputationRep:
    Community Assistant
    Study Helper
    (Original post by THEgurlxo)
    Name:  Untitled.png
Views: 45
Size:  212.7 KB
    Can someone help me on this question please? like walk through it, because the mark scheme doesn't help at all. In all the worked solutions I've seen, the areas are found out using random numbers? I don't have a clue what to do. Thanks.

    (These are the solutions I'm talking about, Idk where the numbers are coming from)

    Question 8 on these:
    http://mathstallis.weebly.com/upload...prac_2h_ws.pdf
    http://homework.m34maths.com/files/d...-Solutions.pdf
    Frequency on a histogram is the area. The median is at halfway point of the frequency so you need to first find the total area then divide it by 2. Then you need to find how far along the x-axis you need to go to get this half area.

    This is often a hard topic for GCSE students. If you still need help tomorrow then let us know and it can be explained to you in more detail.
    • Thread Starter
    Offline

    10
    ReputationRep:
    I still dont understand. How can i work out the area if there are no numbers on the vertical axis?
    Offline

    11
    ReputationRep:
    frequency density= frequency/class width
    • Thread Starter
    Offline

    10
    ReputationRep:
    i still dont get it, there's only one set of numbers
    • Community Assistant
    • Study Helper
    Offline

    20
    ReputationRep:
    Community Assistant
    Study Helper
    (Original post by THEgurlxo)
    I still dont understand. How can i work out the area if there are no numbers on the vertical axis?
    You can count the squares and use that as your scale. You don't need to find the actual frequency (that is impossible because of no scale on the y-axis as you said) but you need to find where half the area lies. And this can be done whatever the scale on the y-axis is.
    Offline

    16
    ReputationRep:
    (Original post by THEgurlxo)
    I still dont understand. How can i work out the area if there are no numbers on the vertical axis?
    They normally give you a table with data and make you work the y axis out
    Posted on the TSR App. Download from Apple or Google Play
    • Community Assistant
    • Study Helper
    Offline

    20
    ReputationRep:
    Community Assistant
    Study Helper
    (Original post by N/A IS THE NAME)
    They normally give you a table with data and make you work the y axis out
    You don't need that to work out the median and this question is an example of that.
 
 
 
Poll
Do you agree with the PM's proposal to cut tuition fees for some courses?
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

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.