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Did anyone take this exam today? How did you find it?
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Statistics 2 - Edexcel Maths
- Thread starter IceOccultism
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It was a decent exam only got stuck on 1c couldn't seem to make the probabilities add up to 1 do you have any answers we can compare
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I thought it was quite decent too. I originally got frustrated with 1c so much that I wasted 20 minutes of the exam stumbling on that question. I decided to leave it to the end, and eventually fixed it such that my probabilities added up to 1. Did you perhaps forget the (1,2,5) * 6 combination? I originally did that.
I will see what I can remember.
1) a) I listed all the permutations. b) I can't remember c) 1 had the value of "0.5", 2 and 5 I forget.
For the questions asking VAR(3-2X) I got 3b^2 I think.
For the question asking for a/b I got a = -3/5 and b = 1.5
I found both of my Hypothesis tests to yield insignificant results henceforth I rejected H1 on both.
I found on the last (or possibly penultimate) question that n would be 29.
That's all I remember but I will edit this message when I remember of more.
Do you by chance remember what the answer was for n (in the Poisson question)? I think that may be the only part of one question I screwed up.
I will see what I can remember.
1) a) I listed all the permutations. b) I can't remember c) 1 had the value of "0.5", 2 and 5 I forget.
For the questions asking VAR(3-2X) I got 3b^2 I think.
For the question asking for a/b I got a = -3/5 and b = 1.5
I found both of my Hypothesis tests to yield insignificant results henceforth I rejected H1 on both.
I found on the last (or possibly penultimate) question that n would be 29.
That's all I remember but I will edit this message when I remember of more.
Do you by chance remember what the answer was for n (in the Poisson question)? I think that may be the only part of one question I screwed up.
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1b i got 27/125 ( not sure)
2a 0.1947
2b 0.1912
2c 0.9525
3a. 0.0985
3b n=12
3c 0.0537>0.05
4a 5b/2
4c 3b^2
4d X-1/3
4e. m=2.5
5a a=-3/5 b=1/5
5c 13/8
6a X<1,X>10
6b 0.2252>0.05
7a Poisson X~Po(0.1)
7b 0.019
7c n=3
7d 0.0137
2a 0.1947
2b 0.1912
2c 0.9525
3a. 0.0985
3b n=12
3c 0.0537>0.05
4a 5b/2
4c 3b^2
4d X-1/3
4e. m=2.5
5a a=-3/5 b=1/5
5c 13/8
6a X<1,X>10
6b 0.2252>0.05
7a Poisson X~Po(0.1)
7b 0.019
7c n=3
7d 0.0137
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Darn, that's some pretty darn good memory!
I honestly can't remember most of the 4sf Probability answers at all, but let's see.
I definitely recall getting that answer on 1b. 2a -> 3a look pretty familiar too! For 3b I got 13, not 12, but I think I may've slipped up on that question. I agree with all of the rest except for n =3. I got n = 29 (or maybe it was n=26, damn memory) but it definitely wasn't 3. I did 1 - P(X=0) < 0.05 I think, or something along those lines.
I honestly can't remember most of the 4sf Probability answers at all, but let's see.
I definitely recall getting that answer on 1b. 2a -> 3a look pretty familiar too! For 3b I got 13, not 12, but I think I may've slipped up on that question. I agree with all of the rest except for n =3. I got n = 29 (or maybe it was n=26, damn memory) but it definitely wasn't 3. I did 1 - P(X=0) < 0.05 I think, or something along those lines.
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Yeah I think I screwed up n=3 I wasn't too sure about that, and as much as I'd like to think it was all from memory I kinda smuggled answers out from the exam....
i got n=3 aswell
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Yeah i ended up doing e^-lambda > 0.05 and using logs which gave me 3, i dunno i hope an unofficial mark scheme will be up by 2mrw