Statistics cu? chuo^'i

[tuan pham <tuan.pham@unsw.edu.au>]

>Vo+'i ga^`n 50% tre^n 30 tuo^?i (gia? su+? so^' na`y chia dde^`u 50% 
>so^'ng
>o+? hai phi'a Nam, Ba('c vi~ tuye^'n 17 tru+o+'c na(m 75) thi` co' i't 
>nha^'t 
>99,99% trong so^' 50% o+? mie^`n Ba('c va` 90% trong so^' 50% o+? mie^`n 
>Nam,
>kho^ng ca?m tha^'y chu't gi` nhu.c nha~ khi kho^ng cha.y ddu+o+.c ra 
>nu+o+'c 
>ngoa`i. (dda^y hoa`n toa`n la` ca'c con so^' chu? quan) 
>
>To^?ng cu?a so^' na`y nhu+ va^.y la` : 50% + (99.99%*50% + 90%*50%)*50% 
>~
>97,5%.
>

Hi

Ma^'y ca'i na`y nghe gio^'ng kie^?u ba'o Nha^n Da^n
la`m statistics qua'! :-)))

O+? ha?i ngoa.i cu~ng co' 1 to+` "ba'o" chuye^n mo^n
la`m statistics kie^?u cu? chuo^'i na`y, ho^`i ddo' to^i 
co' choa?ng cho 1 tra^.n, ddo' la` VNInsight. Tuy nhie^n
tri`nh ddo^. cu?a ho. co`n kha' ho+n :-)

Cheers
Tuan Pham