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# Edexcel S2 - 27th June 2016 AM watch

• View Poll Results: How did you find the Edexcel S2 exam?
Very hard
145
14.71%
Hard
331
33.57%
Normal
293
29.72%
Easy
152
15.42%
Very easy
65
6.59%

1. (Original post by tiny hobbit)
No but I would write down the
x (squiggle) N or B or Po (distrubution)
so that they know what you were intending to use in case you look up the wrong number.
There is often a mark for "evidence of using ...... distribution".
right on. much obliged (Y)
2. Please can anyone explain question 3c on this paper https://57a324a1a586c5508d2813730734...%20Edexcel.pdf as I thought the distribution would have to change since there's only 196 seats not 200 but the approximation has been worked out using 200? Thanks
3. (Original post by economicss)
Please can anyone explain question 3c on this paper https://57a324a1a586c5508d2813730734...%20Edexcel.pdf as I thought the distribution would have to change since there's only 196 seats not 200 but the approximation has been worked out using 200? Thanks
Yes but there are 200 tickets being given out and from those 200 passengers, X won't turn up where X ~ B(200, p). The whole point of them selling 200 tickets when there are 196 is that from those 200 people, a few won't turn up.
4. (Original post by Zacken)
Yes but there are 200 tickets being given out and from those 200 passengers, X won't turn up where X ~ B(200, p). The whole point of them selling 200 tickets when there are 196 is that from those 200 people, a few won't turn up.
Ah I've got you, thank you
5. (Original post by economicss)
Ah I've got you, thank you
Cheers.
6. Hi guys how prepared are u guys for the s2 exam? Have u guys done all the papers and what grades have u been getting
7. Please can anyone explain question 4f on this paper https://57a324a1a586c5508d2813730734...%20Edexcel.pdf The MS says about symmetry, how do we know the graph is symmetrical between 1 and 2 and then 2 and 3? Thanks
8. (Original post by economicss)
Please can anyone explain question 4f on this paper https://57a324a1a586c5508d2813730734...%20Edexcel.pdf The MS says about symmetry, how do we know the graph is symmetrical between 1 and 2 and then 2 and 3? Thanks
Was 2 your result for the mode? The p.d.f. is a parabola in between 1 and 4.
9. (Original post by EricPiphany)
Was 2 your result for the mode? The p.d.f. is a parabola in between 1 and 4.
Yeah Okay thanks, do we get that just from looking at the sketch?
10. (Original post by economicss)
Yeah Okay thanks, do we get that just from looking at the sketch?
From the equation for the p.d.f.
11. (Original post by EricPiphany)
From the equation for the p.d.f.
Got it, thanks for your help
12. (Original post by economicss)
Got it, thanks for your help
No problem.
13. (Original post by EricPiphany)
No problem.
I'm honestly at the point where I'm thinking not to turn up to my S2 exam if I find out I performed well 70-75 ums (b) on M1 since S2 is just a backup module and the A* is from C3/4.

Any advice? I'm just procrastinating learning S2 as its dull/ not interesting like M1... only 3/5 topics on S2 done and I hardly remember much.

What do you think aswell? @Zacken
14. (Original post by XxKingSniprxX)
I'm honestly at the point where I'm thinking not to turn up to my S2 exam if I find out I performed well 70-75 ums (b) on M1 since S2 is just a backup module and the A* is from C3/4.

Any advice? I'm just procrastinating learning S2 as its dull/ not interesting like M1... only 3/5 topics on S2 done and I hardly remember much.

What do you think aswell? @Zacken
I'm not the person to ask actually, Zacken will most probably have a better response. I don't know that much about how the papers are graded, how the scores are done... I just try to do my best.
Just take into consideration what you have told your offers, I suppose. Also, if you know 3/5 subjects well enough, your grade might not be all that bad.
And S2 shouldn't take that much effort to learn, although I was complaining about it too before I got down to doing it.
15. (Original post by blessed107)
Hi guys how prepared are u guys for the s2 exam? Have u guys done all the papers and what grades have u been getting
69.04 out of 75 for s2 - done all (R/IAL/normal) papers apart from 2015 (25 done in total) and got 4 solomons left

basically focus on pdf and cdf - rest of it is easy
16. can someone help me out with june 2006 question 7a. Im not understanding why the lower critical region is P(Xlessthan/equalto 1) instead of P(X=0)... i got the upper critical value.
17. the question...

. It is known from past records that 1 in 5 bowls produced in a pottery have minor defects.To monitor production a random sample of 25 bowls was taken and the number of suchbowls with defects was recorded.(a) Using a 5% level of significance, find critical regions for a two-tailed test of thehypothesis that 1 in 5 bowls have defects. The probability of rejecting, in either tail,should be as close to 2.5% as possible.
18. Please could someone explain question 7d on here https://57a324a1a586c5508d2813730734...%20Edexcel.pdf have never been able to understand it, thanks
19. (Original post by bat_man)
can someone help me out with june 2006 question 7a. Im not understanding why the lower critical region is P(Xlessthan/equalto 1) instead of P(X=0)... i got the upper critical value.
Sorry that you have not had a reply to this - you are welcome to tag me if you want, so that I can see that you've posted something.

Why do you think it is X=0 instead of X=<1?
20. The 2015 paper, last part of question 5 is really tricky.
The hardest question in the paper.

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