[007Shella]

(Original post by Arsey)
Solutions now in the first post

THANK YOU SO MUCH !

MUCH APPRECIATED !

I remember you posted the gcse one last year too! thanks again !

[monstercable]

any ideas on grade boundaries?

[Crowbar]

I enjoyed the histogram question, you use interpolation for the median right?

Probability caused me problems though.

[Tanomc]

(Original post by Arsey)
Solutions now in the first post

Any idea of the boundaries?

[The Assassin]

As I predicted, the only thing wrong for me was the histogram question. And I hope I didn't make any silly errors on other questions.

[CooCurrent]

I don't think I got any of that histogram question except for maybe the first part. The mean really threw me off! I ended up spending 10 minutes only to find I had counted up 450 again which was the given anyway!

[Wireo]

I thought it went ok, but Statistics is really hit and miss for me. I find I make so many little mistakes, and they aren't as generous with follow through marks as they are on say the Mechanics papers.

[craycray]

FINALLY, at least one good paper! Thanks arsey

[JOR2010]

For the venn diagram question, does it matter if you proved independence by shrinking the sample space so W was excluded, so you only had T, B and t'b' and showed that they still were independent by the same method you used?

[InadequateJusticex]

Actually scared to look at the paper :/

[craycray]

(Original post by Jack74)
Easiest paper I've done in my life apart from maybe Unit 2 Chemistry GCSE , only thing i got wrong i think was drawing the regression line on the graph and the skew of the data i got mixed up. :/

Ahhh the only thing I messed up was plotting the regression line too! So annoyinggg

[yayifications]

Think I got 67. All correct except my histrogram.

[Ketchup'n'Mustard]

I don't want to look at the answers in case I spot silly mistakes

[MickyFly42]

****..... xD

[yaboy]

Say i did the pmcc wrong but i sigma xy over the root of sxx x syy would i get a mark or no marks at all?

and for 5.e. if i wrote median because it is not effected by extreme value or outliers will i get the mark?

[Kidioteque]

(Original post by InadequateJusticex)
Actually scared to look at the paper :/

THIS aha, I opened it and looked at the last question, then realised that I can't actually remember quite a few of my answers...

[und]

Ahh crap, I made a mistake and concluded that P(B) and P(T) were independent. Oh well, at least I should get the rest of the marks. Any predictions for the grade boundaries? And if I put that there is positive linear correlation and that as p increases so does t, is that enough to get the marks for why a linear regression model would be suitable?

[Kidioteque]

Had a total mindblank on the histogram. Didn't even think to count the mother-fudging squares Too scared to look at the rest - the fact that I'm guaranteed to have dropped at least 10 marks just from that makes me too fearful of how I'll feel if I've dropped a lot of others :/

[JakeMachinima]

Well I got 61/75, to say I was convinced stats would ruin my life, not bad, haha

[koolkid1011]

Hey two questions, if anyone can answer i'd appreciate it a lot:

1. For question 4a i gave two examples which were (B n W) and (T n W) . Each one is correct but would i be marked down for giving two? i got the explanation correct btw...

2. For question 5e would i get away by saying that the data is almost symmetrical and therefore it would be appropriate to use the mean? Also for question 5d i said the distribution was symmetrical for the same reasons above, again would i get the marks?

Thank you