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Author Topic: O level Stats 4040  (Read 8421 times)

Offline syntacus

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Re: O level Stats 4040
« Reply #30 on: October 17, 2009, 10:56:40 am »
what was ur ans? I got loss of 60 cents...
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Offline slvri

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Re: O level Stats 4040
« Reply #31 on: October 17, 2009, 11:31:46 am »
yeah i also got a loss but i dont remember the value
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i hate A level...........

Offline DrEvil

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Re: O level Stats 4040
« Reply #32 on: October 17, 2009, 01:59:48 pm »
yeah it was a loss $0.60....
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Offline syntacus

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Re: O level Stats 4040
« Reply #33 on: October 22, 2009, 01:43:29 pm »
Did anyone do the scaling one? ( The first question in part B )
And also the last question in part A.
The assumed mean was 299. something right? and the s.d 0.49?
What was to be done in the second part of the question? I just multiplied both the answers by 1000 to get the ans in the thing that was required:/ others did something else though.. dunno.
Also in the true and false question.. I got 2 Trues and 4 False... what about you guys?
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Offline DrEvil

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Re: O level Stats 4040
« Reply #34 on: October 22, 2009, 04:17:36 pm »
I also multiplied with 1000 but its wrong as said by most of the ppl... :( :( :(

well i got 3 trues and 3 false but most of the ppl got 2 trues and 4 false... :(
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Offline syntacus

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Re: O level Stats 4040
« Reply #35 on: October 22, 2009, 06:37:03 pm »
Yar i think most of those people are wrong! It makes no sense to leave the s.d at 0.49!!!! You had to multiply by 1000 as the question said that using your answers in part (i) calculate the s.d and mean in kilometers /hour and not thousands of kilometers/hours as given in the question in the previous part! In the first part most of the people gave the mean as . something... but I think the mean was 299. something!
If someone would remember the exact question that was asked.. anyway that is what I remember and I think what I did was correct :|.Not possible that the mean in part (i) was . something and in part (ii) You just added 299 to it... it makes no sense whatsoever..
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Offline DrEvil

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Re: O level Stats 4040
« Reply #36 on: October 23, 2009, 02:41:33 pm »
u are absolutely right dear but i think this is not smthing that we have to decide on ourselves, lets wait fr the rezults now...i hope that our answer will be right... ;) ;) ;)
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Offline syntacus

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Re: O level Stats 4040
« Reply #37 on: October 23, 2009, 04:22:45 pm »
hmm yeah I guess you are right.
I feel a bit more confident now though because I now know that I wasn't the only one who did the question like this hehe!
Yar really, the paper this time around was very different from before.. I think the percentile will definitely drop and I think one can secure an A at at least 170+
What do you think?
By the way, where from Lahore are you drevil and what school do you go to if you don't mind me asking?
« Last Edit: October 23, 2009, 04:27:34 pm by syntacus »
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Offline DrEvil

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Re: O level Stats 4040
« Reply #38 on: October 24, 2009, 01:28:40 pm »
i think that A will be around 160-165...  :-\ :-\ :-\ :-\ :-\
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“When choosing between two evils, I always like to try the one I've never tried before.”

Offline syntacus

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Re: O level Stats 4040
« Reply #39 on: October 24, 2009, 02:09:01 pm »
Hmm yeah usually the percentile fixes at about 92.5% .
This time definitely the paper was more difficult than the previous times, so I'm pretty sure the A percentile will be around that mark 82 - 85 % .
Lets hope for the best!!!!
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