OCR MEI S2 Exam

Think it went pretty well, hoping for 90UMS but not too sure with those weird worded questions.

Reply 81

supergeek5

What was the answer to the coefficient question?

Reply 82

Original post by supergeek5

What was the answer to the coefficient question?

I didn't really know what it wanted specifically but I put something to the effect of " For every metre in ship length the operational ship speed increases by 0.05 knots."

Reply 83

Keys10

Original post by NickC98

Think it went pretty well, hoping for 90UMS but not too sure with those weird worded questions.

Literally the same as you, never know how they will mark the worded questions :smile:

Reply 84

jcm420

Original post by hatedigi

I didn't really know what it wanted specifically but I put something to the effect of " For every metre in ship length the operational ship speed increases by 0.05 knots."

how many marks was that one? i just threw a guess at it in the end and said that because the coefficient is positive there is a positive correlation between ship length and ship speed? doubt thats what they were asking for though lol

Reply 85

jn998

Original post by jcm420

how many marks was that one? i just threw a guess at it in the end and said that because the coefficient is positive there is a positive correlation between ship length and ship speed? doubt thats what they were asking for though lol

I said the same thing, not sure how many marks it would be worth though

Reply 86

lucydo34

Anyone got a copy of the paper?

Reply 87

dudleyville

what was the independent/ dependant variable?

Reply 88

Original post by jcm420

how many marks was that one? i just threw a guess at it in the end and said that because the coefficient is positive there is a positive correlation between ship length and ship speed? doubt thats what they were asking for though lol

2 marks but I have no idea how.

Reply 89

liv220715

Original post by dudleyville

what was the independent/ dependant variable?

I think independent was length of the ship because you could decide that and the speed was dependent because it varied according to ship length. For the poisson-> normal approximation did you guys round to 49.5 to 50.5, I did 50.5 but I think this was a mistake... If so how many marks do you think I'll lose, will there be follow on??

Reply 90

Original post by liv220715

I think independent was length of the ship because you could decide that and the speed was dependent because it varied according to ship length. For the poisson-> normal approximation did you guys round to 49.5 to 50.5, I did 50.5 but I think this was a mistake... If so how many marks do you think I'll lose, will there be follow on??

I think it was 49.5 since it was more than or equal to.

Pretty sure an incorrect continuity correction is only 1 mark.

Reply 91

liv220715

Original post by hatedigi

I think it was 49.5 since it was more than or equal to.

Pretty sure an incorrect continuity correction is only 1 mark.

Okay thats not too bad then I wasn't sure if it'd mess up the rest, thank you!

Reply 92

Lolort

For the coefficient question it is the extra speed that the ship has due to the length of the ship eg if long length=higher speed, believe that's all you have to say,
Also for regression line got like 0.001 off everyone else for +c , does this matter because I'm sure theres normally a range

Reply 93

jcm420

Original post by liv220715

I think independent was length of the ship because you could decide that and the speed was dependent because it varied according to ship length. For the poisson-> normal approximation did you guys round to 49.5 to 50.5, I did 50.5 but I think this was a mistake... If so how many marks do you think I'll lose, will there be follow on??

independent was definitely length because it was on the x-axis aswell

Reply 94

Original post by Lolort

For the coefficient question it is the extra speed that the ship has due to the length of the ship eg if long length=higher speed, believe that's all you have to say,
Also for regression line got like 0.001 off everyone else for +c , does this matter because I'm sure theres normally a range

Pretty sure they would accept that.

Reply 95

847361542520

Original post by JamieHarris1998

Anyone got any idea on predicted grade boundaries?

Think I did well apart from the questions where you had to comment

I hope the grade boundaries are low since it was a difficult paper but generally the grade boundaries for S2 tends to be higher for an A. I'm thinking it'll be around 53/54 for an A

Reply 96

liv220715

Original post by 847361542520

I hope the grade boundaries are low since it was a difficult paper but generally the grade boundaries for S2 tends to be higher for an A. I'm thinking it'll be around 53/54 for an A

Last year it was 60 for an A though and I think this year was way easier than that paper, might have just felt like that because I'd revised for this one though

Reply 97

PawanAviator

7

Original post by 847361542520

I hope the grade boundaries are low since it was a difficult paper but generally the grade boundaries for S2 tends to be higher for an A. I'm thinking it'll be around 53/54 for an A

It's never been that low to get an A for S2.
It would be a dream to get boundaries like that

Reply 98

JamieHarris1998