OCR MEI D1 15th June & M1 17th June 2016

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Here's a graph showing the grade boundaries over the previous years. I don't know if 2016 can be estimated from it using the difficulty from those years.
OCR MEI D1 Grade Boundaries.JPG

Reply 41

phoebeisgreat

Original post by KR1701

I have just come out of that exam; it couldn't have gone worse. I did not finish, and was unable to answer most questions with confidence. I hope I am not the only one that feels that way.

Same here

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Reply 42

joshie1998

for the critical path, was B a predecessor of A as B was pick the rest of actors, and A was pick the main actors, so did they try to trick us out? because that wasn't in the text nor did it say you had to prepare the scenery before actually installing it?? and what were peoples inequalities for the LP q.....

Reply 43

thebearissquare

Can anyone remember what they got for the constraints how did you find the other constraints
x is greater than or equal to 20
y is greater than or equal to 24
they gave us x+y+z=20
i think the first constraint from part i, i got total Area wasted = 0.08x + 0.21y + 0.04z

Reply 44

joshie1998

Original post by thebearissquare

I got that too mate but then another was x + y is greater and equal to 44.

Reply 45

bethygirl

Does anybody remember how many marks the linear programming question was out of? Absolute joke and dropped every single mark!

Reply 46

username1816287

Original post by bethygirl

Does anybody remember how many marks the linear programming question was out of? Absolute joke and dropped every single mark!

16 all together, 7 for the last part with the graph, 3 marks for the bit before that, formulating the lp
definitely dropped about 10

Reply 47

Danny.L

For the linear programming one, I tried to say x=2A (defined A as product 1), Y=A+B (Defined B as product 2), then Z= 2B, (rather than 3B fmllll).
I then substituted in for my constraints
1)X+Y>=20
2)Z+Y>=24
3)Y+X+Z=20
to get:
3A+B>=20
A+3B>= 24
3A+3B=20
Then plotted it.
Would I get any method marks for this at all?
Or would I even have got it right if I had substituted in z=3B rather than z=2b?

Reply 48

ineedA

That paper was ridiculous, I don't see why the exam board should make a question which Is near impossible to answer, it's ridiculous, there goes my A , possibly b , possible c

Reply 49

username1204031

Original post by ineedA

That paper was ridiculous, I don't see why the exam board should make a question which Is near impossible to answer, it's ridiculous, there goes my A , possibly b , possible c

I know its not much consolation, but you arent the only one :rofl:

Reply 50

lilrabbits

For the simulation question, how would you interpret the results? It worth like 3 marks.

Reply 51

ineedA

Original post by JordanL_

I know its not much consolation, but you arent the only one :rofl:

Literally everyone who did th exam in my school couldn't do the LP and the question after that, that's about 18 marks

Reply 52

lilrabbits

And is n=7 when the p<0.5?

Reply 53

ineedA

Original post by lilrabbits

And is n=7 when the p<0.5?

N is less than7

Reply 54

username1204031

Original post by ineedA

Literally everyone who did th exam in my school couldn't do the LP and the question after that, that's about 18 marks

Yep, I did parts of the LP question but the activity network after it I just couldnt do.

Original post by lilrabbits

And is n=7 when the p<0.5?

I think thats what I got.

Original post by lilrabbits

For the simulation question, how would you interpret the results? It worth like 3 marks.

I think I said they made a net loss or something like that and then gave the mean which was like -1100/5 or something. Then said its not a good strategy.

(edited 7 years ago)

Reply 55

Danny.L

Original post by lilrabbits

For the simulation question, how would you interpret the results? It worth like 3 marks.

I said he had a 0.6 chance of winning within 3 attempts at nicholas' technique.
Not 3 marks worthy at all, but I heard some people talking about the average winnings to losses, and apparently if you tally up all his loses and add on his wins, (in £), he will average a loss, fml should have said that.

Reply 56

Cannoning

Worst exam yet apart from fp1. Ran out of time so i couldnt do prims, and I think i messed up the linear programming.

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Reply 57

lilrabbits

Original post by ineedA

N is less than7

How did you get that? Thanks!

Reply 58

username1258398

Original post by lilrabbits

And is n=7 when the p<0.5?

yea that's what I got

Original post by lilrabbits

For the simulation question, how would you interpret the results? It worth like 3 marks.

I calculate the mean and it was a loss so I said his strategy didn't work :tongue:

not sure what else you could say

Original post by JordanL_

I think I said they made a net loss or something like that and then gave the mean which was like -1100/5 or something. Then said its not a good strategy.

same

the exam overall was incredibly peak tbh

(edited 7 years ago)

Reply 59

phoebeisgreat

I thought this paper was much harder than the 2014 paper which had extremely low grade boundaries so hopefully they will be similar

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