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    S4 wouldn't be S4 without it clashing with another exam!

    For my year, it was D1. For this year it seems to be C4.

    At this stage there aren't that many resources, thankfully the textbook is really all you need.

    General madasmaths resources:

    http://madasmaths.com/archive_maths_...tatistics.html

    One video resource for S4 from FMSP:

    http://www.furthermaths.org.uk/revision-archive

    Physicsandmathstutor:

    Solution bank:
    http://www.physicsandmathstutor.com/...-solutionbank/

    Past papers:

    http://www.physicsandmathstutor.com/...rs/s4-edexcel/

    (Sorry, it doesn't let me insert hyperlinks into words for some reason)

    As ever, if you have any questions, post them below.
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    Signing in.
    I will probably be the only person taking this exam this year.😂
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    (Original post by physicsmaths)
    Signing in.
    I will probably be the only person taking this exam this year.😂
    Even I'm not going this far :-P


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    I'm taking S3 and S4.. also there is a Physics and maths Tutor page with the past papers and a solution bank for the textbook.
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    (Original post by coolguy123456)
    I'm taking S3 and S4.. also there is a Physics and maths Tutor page with the past papers and a solution bank for the textbook.
    I stand corrected have updated the OP with those links.
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    yup taking this exam with a c4 clash #standard

    started chapter 3 and then got to finish chapter 1 (did chapter 2 in 2 days so should finish the module by the end of the week)

    also doing s1,s2,s3,fp1,c4 - s4 seems to be alright
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    https://51625339b1524281e84f3037a08e...nVhdjA/CH3.pdf

    page 9 , i dont understand part b - any help? i knew it would have to be a binomial but it is unclear what the known number of trials is for you to use binomial
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    Are you guys all Yr 12's?
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    Is anyone doing it for AFM????
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    (Original post by SargentZenj2)
    Is anyone doing it for AFM????
    Yeh
    ****ing gna get a E or a D lol.


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    Are there any videos or good resources or anything for S3 or S4. Last years S3 was evil apparently
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    (Original post by SargentZenj2)
    Are there any videos or good resources or anything for S3 or S4. Last years S3 was evil apparently
    Missed my uni offer cos of s3 - needed 80 in it but got 56 :/ resitting it but all i can say is do solomon papers and papers from other exam boards. The review qns are a joke in comparison to the papers tbh and the mixed exercises are pointless too
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    (Original post by SeanFM)
    S4 wouldn't be S4 without it clashing with another exam!

    For my year, it was D1. For this year it seems to be C4.

    At this stage there aren't that many resources, thankfully the textbook is really all you need.

    General madasmaths resources:

    http://madasmaths.com/archive_maths_...tatistics.html

    One video resource for S4 from FMSP:

    http://www.furthermaths.org.uk/revision-archive

    Physicsandmathstutor:

    Solution bank:
    http://www.physicsandmathstutor.com/...-solutionbank/

    Past papers:

    http://www.physicsandmathstutor.com/...rs/s4-edexcel/

    (Sorry, it doesn't let me insert hyperlinks into words for some reason)

    As ever, if you have any questions, post them below.
    Thanks for making this thread OP! I've added it to the Exam Directory Thread which you can find here. Use that thread to find discussions on your other exam papers, and do let me know if you spot any that aren't on the list. Good luck with this exam!
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    (Original post by tazza ma razza)
    https://51625339b1524281e84f3037a08e...nVhdjA/CH3.pdf

    page 9 , i dont understand part b - any help? i knew it would have to be a binomial but it is unclear what the known number of trials is for you to use binomial
    Sorry to see that you did not get a response.

    Do you understand it now?
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    (Original post by SeanFM)
    Sorry to see that you did not get a response.

    Do you understand it now?
    no worries - nope, still don't get it haha
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    (Original post by tazza ma razza)
    no worries - nope, still don't get it haha
    Yikes, it's more of a combinatorics (eww) question than a statistics question. It's not to do with binomial distributions, though it looks a bit like a binomial expansion.

    Ignoring the multiplying by 0.9 to begin with, the first few terms there is finding the number of ways you can arrange 4 objects that aren't between 0.25 and 3 with 2 objects that are. In other words, the probability of getting 4 outside the range and 2 inside the range is 0.9^2 * 0.1^4, and there are 6C2 ways of doing this (number of ways of ordering 6 objects, 2 of type 1 and 4 of type 2) so that's the probability of being in that situation after the 6th item, and then the 7th one has to be... so you multiply by 0.9.
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    any advice for understadning power and type 2 tests? Still having issues with it
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    Also, apart from the past papers and the exercise book, i swear there is nothing else to use to revise? correct me if i am wrong (Y)
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    (Original post by tazza ma razza)
    any advice for understadning power and type 2 tests? Still having issues with it
    What kind of questions/examples are you having problem with? I am not sure how much to say

    Think of the power of a test as a good thing - if the null hypothesis is incorrect, you want it to be rejected. It's usually done by finding the critical values such that, if the null hypothesis were true, this range of values would be 'unlikely' to show up, and if they do then it suggests that the null hypothesis might not be correct. The power function (the function that gives you the power of x, depending on what the actual value of the parameter is) gives you the power.

    Eg if you thought that something was distributed X~N(0,1) (but you were unsure if mu=0) and you wanted to find the critical values for a test where you sum up each observation, those 10 observations would be Y~(0,10), and the critical values would be 0+/- 19.6. This means that the critical values, if mu=0 then getting a sum greater than 19.6 or less than -19.6 would be suspcious.

    Now let's say that mu = 0 is incorrect, and in actual fact mu = 5, and our test (summing up the 10 observations) flags anything up if the sum is less than -19.6 or greater than 19.6. So under the new hypothesis, the sum of 10 would be W~N(50,10) and we want to find the probability of the critical values of the original hypothesis coming up in our observations. So you'd find P(W>19.6) and P(W<-19.6), as if you find those values, then you know that H0 is incorrect, which is what we want, so the sum of those two probabilities is the power.







    (Original post by tazza ma razza)
    Also, apart from the past papers and the exercise book, i swear there is nothing else to use to revise? correct me if i am wrong (Y)

    No, nothing else, but that is all I used as well. There may be some extra resources online but I think the textbook/past papers have enough to keep you occupied.
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    Is there anyone who could help me with question 7b?
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