Turn on thread page Beta
    Offline

    0
    ReputationRep:
    (Original post by adeninesbff)
    For the Chi-Squared test, are we required to remember any formulas, or are they all given to us?
    chi-squared formula is given to us
    so is the formula for standard deviation, t-test and spearmens rank
    Offline

    0
    ReputationRep:
    has everyone revised all the topics
    any tips for memorising the whole content ahhhhh
    Offline

    2
    ReputationRep:
    (Original post by adeninesbff)
    For the Chi-Squared test, are we required to remember any formulas, or are they all given to us?
    We don't have to know the Chi-Squared test. It's not on the spec.
    Offline

    3
    ReputationRep:
    (Original post by Desouza123)
    We don't have to know the Chi-Squared test. It's not on the spec.
    THANK YOU! It's just everyone has been talking about it and I have no idea whether it is coming up or not.
    Offline

    1
    ReputationRep:
    (Original post by mm_7)
    no i meant once its has binded to the allosteric site of the enzyme does it ever 'unbind' or does it stay in the allosteric site permanently?
    No, it can unbind from the allosteric site. However, because they are always present they prevent you from reaching Vmax, as there is a chance that at least one is currently bound to an enzyme (which is why the graph for non-competitive inhibition does not level off at the same point as the standard graph).
    Offline

    2
    ReputationRep:
    (Original post by violavenisis)
    No, it can unbind from the allosteric site. However, because they are always present they prevent you from reaching Vmax, as there is a chance that at least one is currently bound to an enzyme (which is why the graph for non-competitive inhibition does not level off at the same point as the standard graph).
    ohhh! thanks; that was soo much clearer!
    Offline

    1
    ReputationRep:
    (Original post by mm_7)
    ohhh! thanks; that was soo much clearer!
    No problem- just remember that you can get inhibitors that are irreversible (for example, organophosphates in insecticides/herbicides). Our spec doesn't really cover these in great detail, so usually assume that the inhibitor that they are talking about is reversible, unless stated otherwise.
    Offline

    2
    ReputationRep:
    (Original post by violavenisis)
    No problem- just remember that you can get inhibitors that are irreversible (for example, organophosphates in insecticides/herbicides). Our spec doesn't really cover these in great detail, so usually assume that the inhibitor that they are talking about is reversible, unless stated otherwise.
    oh, ok thanks!
    Offline

    5
    ReputationRep:
    anyone got a mark scheme for vbreadth paper?
    Offline

    0
    ReputationRep:
    does anyone have a list of all the PAGS that we need to know for this exam?and please could any of you link me any useful docs or resources with possible PAG questions and answers
    Offline

    1
    ReputationRep:
    does anyone know where i can find topic questions on fish and insect gas exchange
    Offline

    1
    ReputationRep:
    (Original post by Desouza123)
    We don't have to know the Chi-Squared test. It's not on the spec.
    (Original post by adeninesbff)
    THANK YOU! It's just everyone has been talking about it and I have no idea whether it is coming up or not.
    http://www.ocr.org.uk/Images/171693-...ogy-a-h020.pdf <= Is this the right spec?
    On page 48 is says 'Learners may be tested on theirability to select and use:• the chi squared test to test(χ2) the significance of thedifference between observedand expected results• the Student’s t-test• the Spearman’s rankcorrelation coefficient'

    I'm a bit confused because we haven't even touched this formula for the whole year, so maybe it isn't required anymore.
    Offline

    2
    has the secured specimen paper 2 been posted on this thread? if so which page?
    Offline

    2
    ReputationRep:
    (Original post by Internets)
    http://www.ocr.org.uk/Images/171693-...ogy-a-h020.pdf <= Is this the right spec?
    On page 48 is says 'Learners may be tested on theirability to select and use:• the chi squared test to test(χ2) the significance of thedifference between observedand expected results• the Student’s t-test• the Spearman’s rankcorrelation coefficient'

    I'm a bit confused because we haven't even touched this formula for the whole year, so maybe it isn't required anymore.
    I'm not too sure but the official textbook only has SD, Ttest and spearmans rank
    Offline

    0
    ReputationRep:
    In a matter of urgency, does anyone have the breadth or depth practice papers.......
    Offline

    2
    ReputationRep:
    Hi does anyone have any depth past papers?
    Offline

    1
    ReputationRep:
    (Original post by Desouza123)
    I'm not too sure but the official textbook only has SD, Ttest and spearmans rank
    That's so weird. It might be a good idea just to be safe a learn it. It won't take long and if it comes up, it could be worth like 3 marks.
    Offline

    19
    ReputationRep:
    so tomorrow is my last chance of getting a D RIP me
    Offline

    0
    ReputationRep:
    Anyone know what they think will come up in the depth exam tomorrow based on the first exam?
    Offline

    3
    ReputationRep:
    We've been told that chi squared is needed and it does say it is required on the spec. But I just learnt it now for the first time and it doesn't take too long so I'd recommend learning it anyway.

    Also, is the highest amount of marks for a single question 6 under the new spec?

    Thanks!
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: June 27, 2017
The home of Results and Clearing

1,901

people online now

1,567,000

students helped last year

University open days

  1. Bournemouth University
    Clearing Open Day Undergraduate
    Wed, 22 Aug '18
  2. University of Buckingham
    Postgraduate Open Evening Postgraduate
    Thu, 23 Aug '18
  3. University of Glasgow
    All Subjects Undergraduate
    Tue, 28 Aug '18
Poll
How are you feeling about GCSE results day?

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.