Page 10 - PowerPoint Presentation


Mean , E( x)  xf ( x) dx   0 3 1 x dx   3 5 1 xdx K1
6
4

 x 2  3  x 2  5
     

 12  0  8  3

11

4 J1

E (x 2 )   0 3 1 x 2 dx   3 5 1 x 2 dx Var (x )  E (x 2 )  [E (x )] 2
6
4
2



x 3  3 x 3  5  29   11 K1
      3  4 
 18  0  12  3 K1 101

29  48


3

101
s . d  . 1 45 J1
48