IGCSE/GCSE/O & A Level/IB/University Student Forum

Qualification => Subject Doubts => GCE AS & A2 Level => Math => Topic started by: Raed on May 19, 2010, 10:31:40 am

Title: Statistics exam discussion thread!
Post by: Raed on May 19, 2010, 10:31:40 am

hi statistics exam is really close.... lets start discussing now so we could get an earlier discussion...
1st
which topic are you weak on?
i get tricked on those permutation and combination....
its easy to say that P is when order matters.. but C is when order does not matter.........
so lets start discussing!

Title: Re: Statistics exam discussion thread!
Post by: leebux101 on May 21, 2010, 09:57:51 pm

permutations and combinations is where i always loose marks!!

Title: Re: Statistics exam discussion thread!
Post by: Freaked12 on May 22, 2010, 02:24:08 am

I get literally demoralized when i see questions like 2004 June Question 7 part 2.
and question 4 2001 May June

I just did from 2001 to 2004 November.By the way

Title: Re: Statistics exam discussion thread!
Post by: CHEMMASTER6000 on May 22, 2010, 03:47:47 am

corrext me if im wrong but , i assume that you use permutation when you can have the reverse of an arrangement so picking 123 is 1 possibility and 321 is another. and cobination is when you cant in which 123 and 321 is the same

Title: Re: Statistics exam discussion thread!
Post by: zwaliji on May 23, 2010, 08:16:14 pm

i hate permutations and combinations as well..big headache!

Title: Re: Statistics exam discussion thread!
Post by: T.Q on May 23, 2010, 09:32:51 pm

im doing Edexcel S1 on May 27th

gd luck all

Title: Re: Statistics exam discussion thread!
Post by: Metallicnak on May 24, 2010, 07:40:56 am

Do any of u guys hve the edexcel S1 2010 jan marking scheme, would appreciate it if u cold post a link or somethin.
Thanks

Title: Re: Statistics exam discussion thread!
Post by: T.Q on May 24, 2010, 09:44:20 am

Quote from: Metallicnak on May 24, 2010, 07:40:56 am

Do any of u guys hve the edexcel S1 2010 jan marking scheme, would appreciate it if u cold post a link or somethin.
Thanks

check here https://studentforums.biz/index.php/topic,5846.0.html (https://studentforums.biz/index.php/topic,5846.0.html)

Title: Re: Statistics exam discussion thread!
Post by: chaosking on May 24, 2010, 11:43:26 am

i love stats, permutations and comibinations r my fav, cud help u guys..

Title: Re: Statistics exam discussion thread!
Post by: a2man on May 24, 2010, 04:19:44 pm

Dude we need all the help u can give...be a teacher and explaining everything ;D

Title: Re: Statistics exam discussion thread!
Post by: chaosking on May 25, 2010, 04:34:31 pm

we gotta start sumwhere, where at??

Title: Re: Statistics exam discussion thread!
Post by: a2man on May 25, 2010, 04:54:25 pm

k wt abt 'how many ways to arrange if x objects not together"

Title: Re: Statistics exam discussion thread!
Post by: Freaked12 on May 25, 2010, 05:29:00 pm

Quote from: a2man on May 25, 2010, 04:54:25 pm

k wt abt 'how many ways to arrange if x objects not together"

There are two ways to solve this
First find total number of different ways the x objects can be found

th*n find the number of ways they are together.
You find the answer and minus it with the above part i wrote.

Or
Just Assume they are not together and find the permutation/combination of the x objects