Guys do you know what Edexcel will do about our A-Level papers? I read the newest statement and they said that they might “remove” the leaked questions. Don’t you think this is so unfair to people that didn’t buy/see the leaked questions (like me) and did well on those questions?

Reply 224

Moriayo

Original post by chimer

i must be blind. how many marks do u reckon i would get if i write that?

Reckon you’d only lose two for the last step and answer. You still would get marks for working out the separate distributions and probabilities

Reply 225

FelixParkerXD

Lads, I the last question, I made the same mistake as ‘ur busted’ ( I think his name is) and dropped 5, possible another 3 and the Beginning and another 5 for good measure. Is 62 /75 likely to get me and a* or is this just another bottle from me ?

Reply 226

Heidi-Heather

Original post by hitec25

I’ve got the marks per question and my answers will upload when I get home

The hero we deserve.

Reply 227

pollyhy

Original post by UrBusted

look at solutionbank for exercise 7c, questions 7bii, iii and iv, it explains how to do it

why not use mean?? The distrubtion was X, and they gave the scores as e^X and X^2, so expected would be e^(E(X)) and (E(X))^2, no?

take a look

Reply 228

Student89234

How many marks do you guys think I would lose for writing the wrong number of degrees of freedom for the binomial chi-squared test - as I didn’t realise he estimated the probability - and so also coming to the wrong conclusion?

Reply 229

Evil Homer

TSR Community Staff

Original post by AronAdamski

Can you link to the new statement?

Reply 230

ChristophMario

Original post by pollyhy

take a look

ln expansion doesnt use factorials on the bottom, just x - x²/2 + x³/3, so you got an answer that was 1/2 of what you should've due to the 3 and not 3!

Reply 231

LJ2001

Why 3! as denominator and not just 3 as stated in formula booklet?

Original post by pollyhy

take a look

Reply 232

AronAdamski

https://qualifications.pearson.com/en/subjects/mathematics.updates.html?article=%2Fcontent%2Fdemo%2Fen%2Fnews-policy%2Fqualifications%2Fa-levels%2Fmaths%2Fa-level-maths-update-17-june-2019&pageTypes=

Original post by Evil Homer

Can you link to the new statement?

Reply 233

Jowa55

Hence the answer is 1/24ln(2)

Original post by ChristophMario

ln expansion doesnt use factorials on the bottom, just x - x²/2 + x³/3, so you got an answer that was 1/2 of what you should've due to the 3 and not 3!

Reply 234

ChristophMario

Original post by Jowa55

Hence the answer is 1/24ln(2)

Yes!

Reply 235

pollyhy

ah **** lol i can't read thats why

Original post by ChristophMario

ln expansion doesnt use factorials on the bottom, just x - x²/2 + x³/3, so you got an answer that was 1/2 of what you should've due to the 3 and not 3!

Reply 236

the cookie

yeah so did i

Original post by Jowa55

YES!

Reply 237

hitec25

Marks per question/ segment
Q1 Neg Binomial (6)
a) 2
b) 3
c) 1

Q3) Possion (8)
a) 3
b) 2
c) 3

Q3 CLT (6)
a) 6

Q4 Chi (19)
a) 2
b) 1
c) 7
d) 1
e) 4
f) 3
g) 2

Q5 Quality of tests (12)
a) 5
b) 1
c) 3
d) 3

Q6 PGF (12)
a) 1
b) 7
c) 4

Q7 Geometric (12)
a) 4
b) 3
c) 5

Reply 238

Sanjith Hegde123

can we make an unofficial markscheme