Page 152 - Math Grade 12 (Advance)

PROEUS DARA

Cl<.l •
Ip; = 1 Cw ill t = I, 2, 3, ... ,n y 'LP(X = x) = 1 '1

'> '> '
Lli mm 2 H t rH tu t1 SJ tllu x '1
u

Cl"' •
ytuan.H E(X) = 'LxiPi twru z = 1, 2, 3, ... ,n '1

ttl X dlHtd~tut1SJ!:hU &Ulli5 a Sb b ltl~~Gl&d~ tSl&t?itrlS

1. E(a) = a

2. E(aX) = aE(X)

3. E(aX+b)=aE(X)+b '1
"h~JtitSHtd~tut1SJ!:hU X fflbt!:hru Var(X) Aru1ilttllli5 Var(X) = E(X -1-d

tt1ru 1-l = E(X) '1 cr = Jvar(x) n.flirfl~rulntutitll
.,
.. ruQM:tGlh~Jti

ttl X dlHtd~tut1SJ!:hU tUlli5 a Sb b dl~~Std~ &S"Ht?itrlS

1. Var(a) = 0

2. Var(X) = ivar(X)
2
3. Var(aX +b) = a var(X) '1

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