maths S2 students

[crash250]

guys those who r going to to math S2 on 31 may , we need to discuss alot of things ..especially the continous random wariable, when we square the Var(X) and when we
just add it???? it somewhat confusing,,also the sampling do we must know the methods of sampling and wht difference b/w pop variane and sample variance

 

[Mortal9090]

same here, its getting confusing...

I am confused of N(mu,sd^2) notation !

 

[Mortal9090]

found this great tutorial

http://www.athenasc.com/Bivariate-Normal.pdf

 

[crash250]

its ok but we need to discuss any imp questions which are usually asked

 

[crash250]

do we need to have general knowledge about the sampling and whether the sampling is siutable or not by giving reasons???????

 

[crash250]

how to calculate the percentage error

 

[mrpaudel]

ok...here's some thing u need to know...!! lets suppose...u have a ball of mass 20kg....and the ball is denoted by B...then finding Var(3B) needs squaring resulting 9Var(B) ...which means...if anything....a single thing..and if u jus multiply its number and wanna find variance...then u have to square....!! now....rest of others dont..!! jus look at the question...i dont remember any xample than this......like..there are two species...and u wanna to find their varience...!! then..dont square..jus keep in mind that...if there's sth lyk...only double for a single thing...then square...but..if its not lyk that..jus dont square..! actually i dont know how to teach..so sorry man..!! but jus take some concepts..

 

[Mortal9090]

guys those who r going to to math S2 on 31 may , we need to discuss alot of things ..especially the continous random wariable, when we square the Var(X) and when we
just add it???? it somewhat confusing,,also the sampling do we must know the methods of sampling and wht difference b/w pop variane and sample variance

http://books.google.com/books?id=Y4IJuQ ... &q&f=false

read page 410 and onwards!! greatly explained

 

[Mortal9090]

so how was ur paper 72? (s2)

 

[mrpaudel]

mine was awesome...!! i guess m gonna get 40+.....and let me know the answer of type I error guys...bt tomorrow....coz we are not allowed to discuss that today...!!

 

[Mortal9090]

mine was like 47+ for sure , i did very bad in s1