# S2 june 15th 2016 wjec

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#1
???? ha ha ?????
1
4 years ago
#2
Haha I so agree!!! Really messed that exam up !!!!!!
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#3
(Original post by MoistClit69)
Haha I so agree!!! Really messed that exam up !!!!!!
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#4
the correct answer to the last question was infinity over diazonium ion?? did anyone get that
0
4 years ago
#5
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4 years ago
#6
Worst S2 paper in history, Q4 caused casualties
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#7
(Original post by MoistClit69)
what happens when u do good??
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#8
(Original post by Faisalshamallakh)
Worst S2 paper in history, Q4 caused casualties
gunna tie the 20cm string around the examiners neck xx lol
0
4 years ago
#9
(Original post by cartrinthomas)
gunna tie the 20cm string around the examiners neck xx lol
Lol what idiots, it was definitely the most difficult S2 paper I've ever seen and that's saying something because I've done the majority of them starting from 2003
0
4 years ago
#10
Do you guys want the paper, and the answers i believe are correct?
0
4 years ago
#11
0
4 years ago
#12
Question 4 was just a joke
1
4 years ago
#13
These are the answers I got in the exam as far as I can remember, I am not saying they are 100% right... Feel free to correct me.

1a) Mean(W)=6 Var(W)=36
b) P(W=4)=0.09938

2a) 95% C.I. [62.542,64.898]
b) n=56

3a) Upper Quartile=41.68625
bi) Probability=0.4168
bii)Probability=0.9066

4a) Ix-yI>1.431
bi) Probability=0.7016
bii) The probability of accepting the incorrect conclusion is very high, meaning the test is not reliable.

5ai) Ho: p=0.7 H1: p<0.7
aii) p-value=0.2178, Insufficient evidence to conclude the gremination rate is not 70%
b) p-value=0.02275, Strong evidence to conclude that the germination rate is les than 70%

6a) P(Y<8)=0.8
bi) Y=20-X
bii) P(XY>64)=0.6
c) E(XY)=200/3
0
4 years ago
#14
What would 60/75 give me as a UMS considering it was a hard paper?
0
4 years ago
#15
(Original post by MoistClit69)
Haha I so agree!!! Really messed that exam up !!!!!!
Ran out of time >.< You're not the only one!
0
4 years ago
#16
Lovely -Thanks !
Q4 is stomach churning to look at -terrible! Q6 is ok if you click still not very nice!
0
4 years ago
#17
Opinions on grade boundaries? How much for an A?
0
4 years ago
#18
(Original post by English-help)
What would 60/75 give me as a UMS considering it was a hard paper?
I'd say about 90%+ easily this year, maybe even mid 90s considering so many people left out that 14 mark question
1
4 years ago
#19
(Original post by Anonymous_s)
These are the answers I got in the exam as far as I can remember, I am not saying they are 100% right... Feel free to correct me.

1a) Mean(W)=6 Var(W)=36
b) P(W=4)=0.09938

2a) 95% C.I. [62.542,64.898]
b) n=56

3a) Upper Quartile=41.68625
bi) Probability=0.4168
bii)Probability=0.9066

4a) Ix-yI>1.431
bi) Probability=0.7016
bii) The probability of accepting the incorrect conclusion is very high, meaning the test is not reliable.

5ai) Ho: p=0.7 H1: p<0.7
aii) p-value=0.2178, Insufficient evidence to conclude the gremination rate is not 70%
b) p-value=0.02275, Strong evidence to conclude that the germination rate is les than 70%

6a) P(Y<8)=0.8
bi) Y=20-X
bii) P(XY>64)=0.6
c) E(XY)=200/3
I got a different answer for 4a). i got your answer at first but i realised that it was a two sided hypothesis so you had to use the 95% level (not sure if that made sense). i ended up getting 1.473
0
4 years ago
#20
(Original post by siri29)
I got a different answer for 4a). i got your answer at first but i realised that it was a two sided hypothesis so you had to use the 95% level (not sure if that made sense). i ended up getting 1.473
You might be right, I used 1.2816 instead of 1.6449, i think your answer is correct as it is two sided so you split the SL into two.
0
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