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Arsey's S15 S1 Model Answers (in first Post)

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Right, so I missed and didn't see the probability question on scoring 30 points, I went straight to the other part.

Do you think that, if I labelled my answers wrong, because I skipped the part, I won't get any credit for the whole answer :'(

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You will lose marks for the part u missed and marked for what you did

Reply 61

at345

How many marks do you think the P(AUC) part will be for question 6?

Reply 62

baebae

if i get As in all three papers but they are all just a grade boundary, can you guys just roughly say if overall A is possible?

Reply 63

Anon_98

Original post by Boundless_x

That was such a good paper but I was so ill that I didn't have time to put in my answers because I had to leave the exam hall twice.... Worst day to be ill... Really hating myself rn. :cry2:

Hey, its okay- I'm sure you still did really well. <3

I'm about to check my answers with the mark-scheme. Dreading it lol.

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Reply 64

Xx1CALUM1xX

Quite annoyed at this paper now, that H and J que was a bit sneaky. That expected value one is very annoying, I hadn't seen E(x) written like that in a paper before.
For the DRV one I got it only to 0.186624 as I worked out the probability of each occuring to get 30 and must have messed up, hopefully I'll still get 2/3 marks for that.
Cannot judge this now, thought I was on around 90 ums but now...
Quite annoying as I put a lot of work into S1.

Reply 65

jmuz

Original post by Arsey

Here are my answers.

The questions were worded quite strangely. I don't think they were that difficult once you had worked out what to do.

Boundaries, no idea, I'm not sure what to make of this paper.

can you do a break down of how u think each question was like u have done previously (curious on your opinion compared to previous exams)

Reply 66

neek321

With due respect, are you certain you include the outlier in question 1a as part of the range?
Also, I think you misread the question for 2d, as I also initially did and got the same answer as you but then changed it. In the question it says d is the distance of each house FROM the nearest train station. PMCC showed a negative correlation, which means as the price of the houses increased, the distance of the nearest train station FROM the house would fall. Therefore, a more expensive house would have a shorter distance from the nearest train station, is it not? Correct me if I'm wrong, thanks. :smile:

Reply 67

cliverlong

Original post by orangutanswag

Hey I think its meant to be house J that is more expensive as it is closer?

Agree. Negative correlation. Clive

Reply 68

Anon_98

GUYS OMG. So I'm checking my answers right now- and I got the first question wrong. ;( What am I.

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Reply 69

crashMATHS

Original post by Questioner1234

You will lose marks for the part u missed and marked for what you did

Okay thanks

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Reply 70

B Smyth

I got 74/75 because I excluded the outlier. So unlucky.

Reply 71

baebae

i was so ill that i completely did not see part c in one question..guys, if you did not state a letter for the part or mixed the letters but got the right answer, would they mark you down? like for example writing " c) 9.67 when it should be d) 9.67 "

Reply 72

Saywhatyoumean

would 60 for an A be unreasonable?

Reply 73

LearningGeek

Original post by cliverlong

Agree. Negative correlation. Clive

Yeh that's what I put, I got the explanation right but got the letter wrong cuz I put J

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Reply 74

LearningGeek

Original post by B Smyth

I got 74/75 because I excluded the outlier. So unlucky.

Thats so gd man

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Reply 75

username1538497

compared to last years exam, this was nothing.

Reply 76

IvoryToast

For 5b I used the fact that all the probabilities must add to one, I got the same answer as arsey but he used a different way, Would I still get the marks?