Math questions that i wasn't clear on~

• »¤ Liquified ¤« ...

  5 Nov 09, 21:08

  hi guys, i've been doing some revision on my own, but i found some questions that i wasnt clear on how to do >_< can some1 please help~ 

  ps: the boxed questions are the ones i nid help wid~ btw dis are calculater needed questions..(im surpose to be using calc to solve them)

   

  

  thanks sooo much for your helppp >_<

• deepak.c

  5 Nov 09, 21:37

   

  6a) Differentiate.

   

  6b) Normal line gradient = -1/m

   

  

   

• ViewtyKU990

  6 Nov 09, 08:07

  For the sd question,

  Use the formula given

  Root of [(f(x^2)/f) - (Mean)^2]

  in which f(x^2) / f will be   [30(5^2) + 40(15^2) + 50(25^2) + ...] over total frequency

   

   

• wee_ws

  6 Nov 09, 08:26

  Hi,

    For the last question, consider the use of the Binomial distribution.

    Thanks!

  Cheers,
  Wen Shih

• »¤ Liquified ¤« ...

  12 Nov 09, 21:23

  sorry 4 no reply, thx alot guys :D help alot on exams