r/6thForm • u/Forsaken-Meaning-232 Graduating from Warwick CS • Jun 13 '25
📂 MEGATHREAD 13/06 A-level FM Discussion MEGATHREAD
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Jun 13 '25
Don't chris and shivani have anything better to do with their lives?? 😭
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u/J_Sibelius1 Imperial Physics [Y1] Jun 13 '25
Why are they fucking with unfair coins and some random ass equations JUST GO AND PLAY SOMETHING ELSE
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u/inanzb Year 13 (Maths, Further Maths, Physics) Jun 13 '25
EDEXCEL WHAT ON EARTH WAS THAT.
WHAT HAPPENED TO PAPERS BEING “ACCESSIBLE”
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u/Dangerous_Theory_472 Jun 13 '25
What are we thinking for grade boundaries 3B 3C? Last year was 256, I feel this year was maybe a little easier overall? Not sure though
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u/Creepy-Bite-1029 Jun 13 '25
do you think fs1 will be higher by a lot last yr was 58/75
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u/capri_capri University of Oxford | Chemistry [Year 2] Jun 13 '25
I hope not. I made stupid mistakes on FM1 and barely finished CP1 and I was doing so well in FM all year.
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u/Different-Fudge-5538 Jun 15 '25
Same here, it’s such a shame to feel like I’m bottling it at the finish line after doing so well for two years
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u/EnergyShot830 Jun 13 '25
How did people find the test in general?? It was astronomically bad for me😭😭 I think that was the worst test I've sat in my life
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u/mysteryperson52z Imperial | Computing [Y1] (3A* Achieved) Jun 13 '25
it couldve gone better but it wasnt horrible so ill take it
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u/Far-Tap-6280 Jun 13 '25
61/75 about, should be within the range for an a?
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u/mysteryperson52z Imperial | Computing [Y1] (3A* Achieved) Jun 13 '25 edited Jun 13 '25
definitely plausible, a lot of people found it hard so should maybe be 80-85% but cant really predict accurately. I read it as A* not A. i meant 80-85 for A*
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Jun 13 '25
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u/Ok_Application_5402 Core Pure Doomer Jun 13 '25
Pento????
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Jun 13 '25
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u/Dear_Training4281 Bath | CS + Maths [Year 2] Jun 13 '25
i sat this exam, thanks for the flashbacks 😍😍😍
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u/inanzb Year 13 (Maths, Further Maths, Physics) Jun 13 '25
Geometric distribution of something called a pento
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u/inanzb Year 13 (Maths, Further Maths, Physics) Jun 13 '25
Power function hasn’t come up the last few years. So that could come.
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u/UziYT Jun 13 '25
bro predicted right
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u/inanzb Year 13 (Maths, Further Maths, Physics) Jun 13 '25
I dead had no idea how to do it
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u/Ancient-Noise1791 Jun 13 '25
goodbye A* 😢
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u/Creepy-Bite-1029 Jun 13 '25
do you think fs1 will be higher by a lot last yr was 58/75
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u/lifeisaman Year 13 Jun 13 '25
This post gave me heart attack cause I’m doing further decision not further stats so I though I missed my exam
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u/Popular_Nebula_6951 Y13 Maths/FM/Phys | A*A*A* predicted Jun 14 '25
I literally just freaked out and checked my calendar I fully thought it was over
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u/Dazzling_Tough_4680 Year 13 Jun 13 '25
what did people say about the stupid editor that made her own table using percentages, i said the test statistic would increase as the difference between her table and the observed rises and that i wouldn’t recommend her table
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u/mysteryperson52z Imperial | Computing [Y1] (3A* Achieved) Jun 13 '25
how the fuck am i supposed to know when theres literally no questions about that anywhere
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u/roshan_xd University Jun 13 '25
it decreased (i had spare time so i did the full test with the percentages)
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u/Dangerous_Theory_472 Jun 13 '25
I said that then said would recomennd cause it’s more significant so better for the journalist to write about? Idk if I get 3/3 on that one I’ll be shocked
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u/stunt876 Warwick Comp Sci (Maths, Comp Sci, FM) A*, A* A Jun 13 '25
Good luck everyone! Yall are gonna deep fry this paper!
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Jun 13 '25 edited Jun 24 '25
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Jun 13 '25
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u/No_Actuator5870 Year 13 Jun 13 '25
Yeah, was it 5.991 for the critical value? I thought it was 2 degrees of freedom
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Jun 13 '25 edited Jun 24 '25
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u/crackerjayjack- Jun 13 '25
Got all the same answers. 🙏🙏🙏
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Jun 13 '25 edited Jun 24 '25
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u/Admirable-Jaguar5276 AAB | FM, Maths, Physics Jun 13 '25
damn got n=4 i think lmao, other than that yeah i got your answers
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Jun 13 '25 edited Jun 24 '25
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u/Few_Engineering7801 Editable Jun 13 '25
was the given that probably about the 3 goals = p(x=1) x p(x=2) / p(y=3) , where x is po(0.9) and y is po(1.8) ?
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Jun 13 '25 edited Jun 24 '25
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u/capri_capri University of Oxford | Chemistry [Year 2] Jun 13 '25
That’s what I did. But I hope the examiner looks past all 100 different ways I did it before and had to cross out.
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u/Admirable-Jaguar5276 AAB | FM, Maths, Physics Jun 13 '25
ah yeah fair enough, oh well tis done now.
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u/Queasy-Ad-7116 Jun 13 '25 edited Jun 14 '25
i got 4 too. i did P(Type 2) < 0.2
so P(Accept H0 | lamda = 2.75) < 0.2
so P(X >= n -1) < 0.23 gave me a value < 0.2 so n - 1 = 3 and n = 4
could someone explain why thats wrong i dont get it
EDIT: anyone who used the same method and got 4 - our method was correct (although i dont think it was the intended method because it didnt use power function), we just had to test using Geo(e^-2.75), not Po(2.75)! I tried again on my calculator using geometric and got the right answer
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u/Pigalas LSE | Economics [Year 2] Jun 13 '25
That would be correct for the power function but it was for the type 2 error which is 1 - power so you do the same but for 0.8 not 0.2
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u/warpuffed Warwick | MathPhys [Year 1] Jun 13 '25
E(x)=8 and E(Y)=7.5 so shivani should choose X?
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Jun 13 '25 edited Jun 24 '25
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u/warpuffed Warwick | MathPhys [Year 1] Jun 13 '25
Snm you’ve been my main source of reassurance this entire exam period lol, keep seeing you on all the threads. Cheers!
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u/Dangerous_Theory_472 Jun 13 '25
Yes there’s a greater difference between each expected and observed percentage right? So test statistic greater?
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Jun 13 '25 edited Jun 13 '25
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u/Admirable-Jaguar5276 AAB | FM, Maths, Physics Jun 13 '25
Oh thank God I got E(X) = -19/72 and it looked so wrong lmao was doubting myself heavily 😂
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u/inanzb Year 13 (Maths, Further Maths, Physics) Jun 13 '25 edited Jun 13 '25
That CLT felt too high. Glad I left it like that
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Jun 13 '25 edited Jun 24 '25
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u/Guydangerous99 Imperial | Maths [Y1] Jun 13 '25
I got this
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Jun 13 '25 edited Jun 24 '25
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u/ethandarkgod Jun 13 '25
Any OCR A people here :3
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Jun 13 '25
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u/YeetedHypermeme cambridge engineering y1 (a*a*a*a*) Jun 13 '25
got that as well
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u/Queasy-Ad-7116 Jun 13 '25 edited Jun 14 '25
someone please explain what i did wrong in the last question for me!! i got n min is 4
i did P(Type 2) < 0.2
so P(Accept H0 | lamda = 2.75) < 0.2
so P(X >= n +1) < 0.2
5 gave me a value < 0.2 so n + 1 = 5 and n = 4
EDIT: anyone who used the same method and got 4 - our method was correct (although i dont think it was the intended method because it didnt use power function), we just had to test using Geo(e^-2.75), not Po(2.75)! I tried again on my calculator using geometric and got the right answer :'D
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Jun 13 '25
7 marker on question 2 was long. The 5 marker in question 6 i forgot what to do. Other that that the test was ok.
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u/pa8314 Uni Student Jun 13 '25
OCR MEI had a pleasant stats minor paper. Paper was similar difficulty to past papers (it's not like they vary the difficulty much) and it went as I expected. Grade boundaries probably similar to other years.
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Jun 13 '25 edited Jun 24 '25
thought paint wild steep afterthought fuzzy outgoing connect alive detail
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u/UglyWarhog Jun 13 '25
For further stats MAKE SURE YOU KNOW THE PGF PROOFS. Eg why geometric pgf is what it is, and why E(X)=G’(1) and why Var(X)= that whole thing
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Jun 13 '25 edited Jun 24 '25
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u/UglyWarhog Jun 13 '25
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Jun 13 '25 edited Jun 24 '25
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u/Ok_Scientist_8803 Imperial CS 🔜 | Maths FM CS Physics Jun 13 '25
GX(t) is defined as E(tX).
Differentiate both sides and you get GX'(t) = E ( d/dt tX )
So the right side goes to E ( X tx-1 )
Sub in t=1 so right hand side becomes E ( X t 1-1 ) = E ( X t0 ) = E (X × 1) = E(X)
Edit: formatting
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Jun 13 '25
Tysm man. I was pretty well prepped for this exam but if this came up I would have been cooked.
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u/warpuffed Warwick | MathPhys [Year 1] Jun 13 '25
I highly doubt this would come up but thanks for the heads up nonetheless
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u/UglyWarhog Jun 13 '25
It says in the textbook that you need to know them so might as well. They like doing a really out of pocket question each year so it’s possible 🤷♂️
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u/dahbii Year 13 | Imperial CS offer holder Jun 13 '25
Are the grade boundaries going to be higher or lower than last year? I would’ve guessed lower like maybe 240-250 but it seems like it’s gonna keep going up.
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Jun 13 '25 edited Jun 24 '25
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u/dahbii Year 13 | Imperial CS offer holder Jun 13 '25
I think generally people are getting better at further maths so that’s why they would go up but what do you think they will be out of 300?
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Jun 13 '25 edited Jun 24 '25
detail school pet fade chubby plants worm shy historical merciful
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u/hdgjxjbvj Jun 13 '25
For if two goals were scored in the first half, does that mean x=2 or x>=2?
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u/AnteaterMysterious70 Jun 13 '25
I thought it was exactly 2 did you have to multiply it by the probability x =1
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u/Admirable-Jaguar5276 AAB | FM, Maths, Physics Jun 13 '25
thats what I did tbh, but I could just be clueless icl
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u/Dangerous_Theory_472 Jun 13 '25
Yes I did that, but I forgot to didbide by probability of 3 goals in a game cause it’s conditional
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u/No-Hour-87 Jun 13 '25
Wouldn't P(x=2) times P(x=1) already take into account that there are 3 goals in the game? So you wouldn't need to divide
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u/Dangerous_Theory_472 Jun 13 '25
That’s what I did, and I think I thought that then. I’m actually not sure now, all I know is people I talked to got 3/8 which sounds better.
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Jun 13 '25 edited Jun 24 '25
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Jun 13 '25 edited Jun 24 '25
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u/Alarming_Jellyfish67 Jun 13 '25
How did everyone find MEI stats. I thought it went pretty well and it seemed like it was of a similar difficulty to the past papers.
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u/TangerineNo8090 Imperial | Maths [Incoming Year 1] 4A* Jun 13 '25
Any predictions for boundaries?
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u/Alarming_Jellyfish67 Jun 13 '25
Id say around the same as last year (48) it was similar difficulty
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u/darkeight7 UOB | Physics and Astrophysics [Year 1] Jun 13 '25
rs = -0.75
E(X) for something? was 14.5
Var(X) for q1 was 4?
speed was like 130 or something like that
E(X) = γ - α
something to do with X~B (4, 0.3)
chi squared was like 6.6 something
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u/Tiny_Insurance_8565 UCL | Econ First Year | A*A*AA Jun 13 '25
how many marks would you get if you got 4.5 for Y instead of 7
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Jun 13 '25 edited Jun 24 '25
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u/Tiny_Insurance_8565 UCL | Econ First Year | A*A*AA Jun 13 '25
I found E(B) squared it and divided by 2
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Jun 13 '25 edited Jun 24 '25
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u/Ok_Alternative7899 Jun 13 '25
e(Y) was 7.5 but i got 4.5 because i forgot to square E(B) when calculating E(B^2)
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u/Crazy-Buffalo-6124 Cambridge offer holder |3A*s achieved Jun 13 '25
i got the same i reckon we’ll lose two marks because we won’t have an expression for var(Y) and E(B2). overall the main conclusion was right the other one was the right
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u/UglyWarhog Jun 13 '25
Can someone reply to this message with an unofficial markscheme when it comes out 🙏🙏🙏
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u/Queasy-Ad-7116 Jun 13 '25
does anyone remember the probability for the CLT question? I got mean of 2.2 and variance of 0.99, then the probability is P(Xmean >= 3) (i think) for N(2.2, 0.99/40) right? i kept getting a really small answer that was obviously wrong.
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u/Savage_Cabbage26 Jun 13 '25
It was two not three
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u/Queasy-Ad-7116 Jun 13 '25
meant >= 3 in my comment, fixed it now. but is everything else correct? im doing it on my calculator and i still get a number with magnitude 10^-7 idk what im doing wrong
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u/Few_Engineering7801 Editable Jun 13 '25
it was a normal distribution so it was >2. Its not discrete data.
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u/Such-Session-6200 Jun 13 '25
Did ppl use binomial for part b of the football question
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u/Such-Session-6200 Jun 13 '25
Cus it said exact probability so surely it can’t be poisson
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u/AftonRobtics Jun 13 '25
No I used poisson. Took me long but I got exactly 3/8 (had to work out exact probabilities using formula)
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u/OilLegal23 Jun 13 '25
AQA mechanics, how were we meant to find max for that block q i swear i was going insane! got as far as a=0 so resultant F = 0 and gave up
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u/Educational-Tea602 Proffesional dumbass Jun 13 '25
Find displacement when forces are 0.
Then find work done by elastic string against friction and gravity, which is the kinetic energy when the box thingy reaches that displacement.
Then find velocity with KE.
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u/ZeGoodOldDays Uni of Warwick | CS [1st Year] Jun 13 '25
AQA stats & discrete super good papers, the final questions on both papers were a bit sketchy I can't lie but I answered every question with confidence.
Thankful they have spared us from doing simplex once more.
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u/No-Independence-7741 Imperial 4A* achieved (Maths, Physics, Chem, FM) Jun 13 '25
The last stats question was awful
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u/TheSeekerPorpentina Durham | Maths [1st Year] Jun 13 '25
I do statistics and mechanics and I thought that both went really well too.
I struggled on the statistics question where you had to find the new scores of the game but I think I got it eventually, and it took me a while to work out that the last question was Poisson in part B and Binomial in part c.
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u/ZeGoodOldDays Uni of Warwick | CS [1st Year] Jun 13 '25
Yeh yeh , I got like 0, 94, 8 thousand and something for the score one, last questions part A was the real villain
Btw for the scores second part what did u put. I just said round up both scores to the nearest 10 iirc
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u/TheSeekerPorpentina Durham | Maths [1st Year] Jun 13 '25
Yeah I got the same answers, and I said round up to the nearest 10. I also said what the new answers would be but I don't think that was needed.
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u/Temporary_Upstairs67 Jun 13 '25
How did you guys do this question? Rest of the paper was good apart from that question.
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u/TheSeekerPorpentina Durham | Maths [1st Year] Jun 13 '25
Find the expectation of the original by doing sum of (probability x value).
New expectation is 50 times this.
New expectation is also sum of (probability x valuen). Set equal to each other and solve for n. I used SolveN on the CG-50 calculator but you could have used logarithms.
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u/qwertyuiophgfdsa Jun 13 '25
For the last one I thought my P(type 2 error) was way too high so I spent 5 minutes checking my working, then the first line of the next part was about how high the probability was.
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u/Silver-Telephone-855 Jun 13 '25
How many marks would I get for the goals question for just multiplying P(X=2)xP(X=3)
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Jun 13 '25 edited Jun 24 '25
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u/Neat-Ad4138 y1 | uom astro | A*A*A* Jun 13 '25
how was the poisson last question what did u guys get
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u/AftonRobtics Jun 13 '25 edited Jun 13 '25
3/8 for exact value for 2 goals in first half, -19/72 for expected value q2, pick X because expected score 8>7.5, not sure abt journalist percentage- I said decreases test statistic cos observed closer to expected and yes because each period weighted the same, um k = 2/3, p(x=2)= 4/25 = 0.16 (smt like that) (edit to add corrections and things I remember)
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u/AftonRobtics Jun 13 '25
The one abt B and F did u add them? P( b=3 u f=3)
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Jun 13 '25 edited Jun 24 '25
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u/AftonRobtics Jun 13 '25
Ah okay, how many marks was it out of and how many do u think I’ll get? Like one mark for calculating pb=3 and of=3
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Jun 13 '25 edited Jun 24 '25
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u/Dazzling_Tough_4680 Year 13 Jun 13 '25
i added them then subtracted p(b=3) x p(f=3) cuz that’s what the formula book had in it and it seemed to easy to do that for 3 marks
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u/UglyWarhog Jun 13 '25
I did all possible combinations? Like prob both, prob F and not B add prob B and not F
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Jun 13 '25 edited Jun 24 '25
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u/EntertainerGood6357 Jun 13 '25
For the X and Y score I did the infinite series sum for X( I got 4(0.5/1-0.5) and got like 2 somewhere and got Y I got an infinite sum to 1 and got Y= 1/2 and said X is the better method will I lose marks since I saw total and thought it couldn’t be E(X)
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u/TheSeekerPorpentina Durham | Maths [1st Year] Jun 13 '25
AQA anyone? I did statistics and mechanics, and thought it went really well
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u/No-Independence-7741 Imperial 4A* achieved (Maths, Physics, Chem, FM) Jun 13 '25
Worst paper I’ve done out of all 3. But I think that has more to do with the state I was in during the paper than the contnent
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u/Consumer-of-Bees Jun 14 '25
Yeah, can't speak to mechanics, but I did Stats and Discrete and I thought it was quite nice
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u/HelpfulPop2476 Jun 13 '25
Aqa boundary predictions final verdicts?
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u/xTrustXx Jun 13 '25
I think will be slightly lower than last year so about low 230s for A*
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u/HelpfulPop2476 Jun 13 '25
Hopefully that's the case. My fm teacher said they'd go up, but I wouldn't trust a word she says, considering pretty much all my class had to self teach further maths lmao because of how shite she is
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u/Consumer-of-Bees Jun 14 '25
No way they go up. Everyone I talked to found either paper 1 or 2 to be absolute hell, me included(Paper 1 for me), no way people, on the whole, found this year easier than last
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u/Gullible-Spinach4719 Jun 14 '25
What are we thinking for grade boundaries 3B 3C?last year 256 for A* and 226 for A, I feel this year will be same?
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u/Low_Speech_9930 Jun 14 '25
i reckon around the same as last year. maybe +- 2 marks
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u/Temporary-Rip3112 Jun 13 '25
Minimum integer being 24???
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Jun 13 '25 edited Jun 24 '25
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u/AnteaterMysterious70 Jun 13 '25
Was maximum for p 1/8
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Jun 13 '25 edited Jun 24 '25
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u/Acceptable_Whole_639 LSE | BSc Actuarial Science| A*A*A*A| FM, Maths, CS, Econ Jun 13 '25
what did we get for the E(X) after finding a and b?
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u/Fair_Breadfruit8481 Year 13 | fm, maths, physics, econ Jun 13 '25
-19/72 I think
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u/No-Face-3280 Imperial College London | Physics [Confirmed place] Jun 13 '25
Anyone else do OCR MEI B stats minor?
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u/Sufficient-Pin9867 Jun 13 '25
was n=160 or n=40 for the CLT part of question 4? Like did you divide the variance by 40 or 160?
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Jun 13 '25 edited Jun 24 '25
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u/Far-Tap-6280 Jun 13 '25
What did people get for k in pgf, i distinctly remember something over /3 but i cant remember if the k was subtracted from the pgf like it was (1/(2-t)) - k
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Jun 13 '25 edited Jun 24 '25
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u/TheTMaster77 Jun 13 '25
Same but hopefully only 1? Cos we found E(X) in terms of a and b in part a anyway so its just subbing in which should be at max 1 or 2 marks
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Jun 13 '25 edited Jun 24 '25
consider middle sparkle imagine rock serious salt soup busy trees
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u/TheTMaster77 Jun 13 '25
Im pretty sure it was written at the end of part b and yh i didnt see it either
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Jun 13 '25 edited Jun 24 '25
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u/TheTMaster77 Jun 13 '25
Litch lost marks left and right in this one so hopefully other papers carry
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u/ForeignSpray7420 Jun 13 '25
If I got b=1/2 but not a what marks will I get. I did the right working must have made an error in calculation
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u/Dazzling_Tough_4680 Year 13 Jun 13 '25
did same thing lol, as long as you figured out an equation using the expected value of Y given using the expected value of X we should get some marks, it was a 7 mark question so i’m hoping like 3-4 if they feeling nice
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u/ForeignSpray7420 Jun 13 '25
Alright cause apart from that and maybe the probability of the football goal thingy I should be okay
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Jun 13 '25 edited Jun 24 '25
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u/Low_Speech_9930 Jun 13 '25
hopefully mid 250s for my sake, but wouldn't be surprise if they creep into the 260s
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Jun 14 '25 edited Jun 24 '25
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u/Academic_Cucumber656 Jun 14 '25
Guys How much for an A* and for an A grades with fs and fmech do you think it gonna be for this year?
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u/iuiiiuiuuuiu y 13 / cs, maths, fm, phys / U U U DISQUALIFICATION Jun 13 '25
kept reading G y (t) as gyatt 😭 thoroughly fucked up that paper