Math Stats!

[TalhaMalik]

Confused! Can anybody help me in permutation and combination chapter. Post some useful notes and tips...all i want is to get is 47+ in stats to keep my hopes for an A

 

[ahmed t]

all u want is a 47+
seriously wat the hell thats only three marks off
keep ur expectations lower to avoid dissapointment, trust me

 

[TalhaMalik]

I am targeting that score although expecting 42+

 

[ahmed t]

ive got a question for u
give me all data collection methods with there parameters
eg
normal dist. parameter is.........
and so on

 

[ahmed t]

i hardly ever get 45 sooooooooooooooooooo
47 is alot

 

[TalhaMalik]

I did not get ur question. I never learned that stuff!

 

[ahmed t]

there is one exam it came in that but i cant remember

 

[ahmed t]

http://www.xtremepapers.me/CIE/International A And AS Level/9709 - Mathematics/9709_w10_qp_63.pdf
first question

 

[TalhaMalik]

For Normal distribution there are no fixed parameters! It depends upon the possilbe values. Weight may be from 55 to 70. Mean can be taken as 65.

I dont know how to find the variance in this question. May be it's npq. I am not sure about that !

 

[ahmed t]

give a guess of about 5 kg
most pple would have a deviation 5kg around 65kg

 

[TalhaMalik]

What about finding variance?

 

[Serenity]

@TalhaMalik....here is a site which might help you revise all the important topics in Statistics...including Permutation and Combination...

http://www.mathsrevision.net/alevel/statistics/