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Statistics S1B 17/05/2013 Thread

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Reply 220
Avatar for M^2012
M^2012
Original post by Ingamo
I put 27 too :s-smilie:


Yeah, you just worked out the probability, and then the mean, which would be the expected result (27) :smile:
Original post by Ingamo
I put 27 too :s-smilie:


Wow. I might have got a probability question right for once O_O
Reply 222
Avatar for EmilyC96
EmilyC96
3
Original post by RoseBrilliante
For the last part of the auction house question, did people get the answer as 27 (out of 40)?
I literally had no idea what I was doing


I got that :smile:
Reply 223
Avatar for EmilyC96
EmilyC96
3
What did people put for the last couple of questions for 4. Like calculate the least squares regression line ?
I got y = 0.6 + x
But I'm not sure I'm right because I just used a random formula from the booklet because I haven't come across anything like it before :/
Unofficial Mark Scheme anyone?
Reply 225
Avatar for MrJiggly
MrJiggly
2
So the exam wasn't too bad eh.

Original post by RoseBrilliante
I definitely got the same as you for the last one but I can't remember anything else


I'm one of those people who delete everything (involuntarily) on the ol' noggin after the exam's over, but that answer seems familiar to me too.

I think it was the 'b' part of the prob question.
(edited 10 years ago)
Reply 226
Avatar for MrJiggly
MrJiggly
2
Original post by EmilyC96
What did people put for the last couple of questions for 4. Like calculate the least squares regression line ?
I got y = 0.6 + x
But I'm not sure I'm right because I just used a random formula from the booklet because I haven't come across anything like it before :/


that is exactly what I got.

what did you get for the very last part of question 6?

(and sorry for the double post...if that matters here)
(edited 10 years ago)
Reply 227
Avatar for EmilyC96
EmilyC96
3
Original post by MrJiggly
that is exactly what I got.

what did you get for the very last part of question 6?

(and sorry for the double post...if that matters here)


Im not sure on the exact value but for the second to last i used variance/n

and for the last i only did it normally so like P(X>25) for variance.

I have no idea if that makes sense or not but it might be wrong because people are talking about ^10 :L I cant really remember the question properly either :/ sorry!
Reply 228
Avatar for seajamiet
seajamiet
Original post by RoseBrilliante
Wow. I might have got a probability question right for once O_O


Uhhh... i put 28? Anyone else get this cuz im obviously wrong.

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Reply 229
Avatar for Son234
Son234
Original post by M^2012
Yeah, you just worked out the probability, and then the mean, which would be the expected result (27) :smile:


Fair to say i think I over thought mine lol

But that still doesn't make sense to me


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Reply 230
Avatar for Son234
Son234
Original post by EmilyC96
What did people put for the last couple of questions for 4. Like calculate the least squares regression line ?
I got y = 0.6 + x
But I'm not sure I'm right because I just used a random formula from the booklet because I haven't come across anything like it before :/


I got that but I just put +1.00x don't know why habit :L


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Reply 231
Avatar for Ingamo
Ingamo
1
Original post by Son234
Fair to say i think I over thought mine lol

But that still doesn't make sense to me


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The probability was 0.85-0.175 i think
and then you times that number by 40 and you get 27 i think :smile:
Reply 232
Avatar for MrJiggly
MrJiggly
2
Original post by EmilyC96
Im not sure on the exact value but for the second to last i used variance/n

and for the last i only did it normally so like P(X>25) for variance.

I have no idea if that makes sense or not but it might be wrong because people are talking about ^10 :L I cant really remember the question properly either :/ sorry!


yea I used (σ/√n) - same thing

for the last one I divided the answer on my calc by 10 for some weird reason.
(edited 10 years ago)
Reply 233
Avatar for Son234
Son234
Original post by Ingamo
The probability was 0.85-0.175 i think
and then you times that number by 40 and you get 27 i think :smile:


Yep that makes sense! 73/75 :frown:


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Original post by Son234
Yep that makes sense! 73/75 :frown:


This was posted from The Student Room's iPhone/iPad App


If you're confident you got full marks on everything else then that's still effing amazing! I'd be lucky if I got a B
Reply 235
Avatar for bgfuqj2
bgfuqj2
Terrible paper. Hope grade boundaries drop to 57 like some previous years.
Reply 236
Avatar for Son234
Son234
Original post by RoseBrilliante
If you're confident you got full marks on everything else then that's still effing amazing! I'd be lucky if I got a B


It just means i know i have lost 2marks so I have 73 marks to play for lol

Atm which I'm sure will decrease by this evening

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Original post by Son234
It just means i know i have lost 2marks so I have 73 marks to play for lol

Atm which I'm sure will decrease by this evening

This was posted from The Student Room's iPhone/iPad App


Oh hahah :colondollar: But still, you seemed quite confident anyway. I bet you would've done well
Reply 238
Avatar for Son234
Son234
Original post by RoseBrilliante
Oh hahah :colondollar: But still, you seemed quite confident anyway. I bet you would've done well


I wish you didn't say that

Really cheers me down lol

And hopefully grade boundaries will be low so everyone is happy :smile:


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Reply 239
Avatar for Ingamo
Ingamo
1
Original post by Son234
Yep that makes sense! 73/75 :frown:


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Haha yeahh same, I did the write method but got the wrong number -_-
You can usually drop 15-20 marks and still get an A though :smile:

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