> Nhu+ va^.y thi` ty? le^. xa^'u ho^? la`
> 950/2000 = 47.5%, chu+' sao la.i 97.5% ha?
> ba'c?
>
>
Hehe, ba.n Tuan chu*a biet sao? Nguo`i tre^n 30 tuoi da^u co`n bie^'t
xa^'u ho^? la` gi` nu*~a da^u ma` ti'nh vo*'i toa'n! Chi? co' nguo`i <
30 ca'i xua^n xanh mo*'i biet xau ho^? tho^i. Tui ma` la`m thong ke^
nhu* ba.n Truong thi` ket qua cu?a tui se~ la` 100% do', vi` du*.a tre^n
nhu*~ng nguo`i duo'i 30 ma` tui "pho?ng va^'n" thi` tui kho^ng tha^'y
co' ai ca?m tha^'y xa^'u ho^? ca?!
;-)
/cuong
> ----------
> From: Tuan V Nguyen[SMTP:rknguyen@yahoo.com]
> Reply To: vnsa-l@csd.uwm.edu
> Sent: Monday, August 03, 1998 9:44 AM
> To: Multiple recipients of list
> Subject: Re: Statistics cu? chuo^'i
>
> At 07:27 AM 8/3/98 -0500, you wrote:
> >>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%.
>
> Hello,
>
> Ba'c ti'nh toa'n gi` ma` hay va^.y? OK,
> dde^? tui la^?m ca^?m la`m la.i ba(`ng ca'c
> con so^' cu?a ba'c nhe'. Gia? su+? nhu+ ta co'
> to^?ng so^' da^n la` 2000 ngu+o+`i; trong ddo'
> co' 1000 tre^n 30 tuo^?i, 50% Nam va` 50% Ba('c.
> Let us tabulate them in a table as follows:
>
> South North Total
>
> To^?ng so^' 2000
>
> N >30 yrs old 500 500 1000
> Ti? le^. xa^'u ho^? .9999 .90
> N xa^'u ho^? 500 450 950
>
> Nhu+ va^.y thi` ty? le^. xa^'u ho^? la`
> 950/2000 = 47.5%, chu+' sao la.i 97.5% ha?
> ba'c?
>
> Ba'c ru't ra ddu+o+.c ba`i ho.c gi`
> tu+` ca'ch ti'nh na`y chu+a?
>
> Nhie^`u khi ddo.c ba'o VN ma` tui
> buo^`n cu+o+`i; ho. la`m nh~ con so^' tho^'ng
> ke^ chi'nh xa'c dde^'n 2 decimal places. Thu'
> tha^.t vo+'i ca'c ba'c, ma^'y ca'i loa.i
> quoting numbers kie^?u na`y chi? la`m la.c
> dde^` chu+' cha? informative ca'i qua'i gi`
> ca?. Ta.i sao kho^ng no'i pha^n nu+?a da^n
> so^' la`m X, ma` la.i no'i 49.56% la`m X.
> Ba'o chi' vie^'t cho dda.i chu'ng ddo.c chu+'
> co' pha?i cho scientists dda^u? Ma` ngay ca?
> scientists cu~ng cha? ai care ca'i chi'nh
> xa'c na`y which is itself often questionable.
> Ba'c TPham no'i qua' chi' ly'!!!
>
>
> ==
> Tuan V Nguyen
> Email: rknguyen@yahoo.com
>
>
>
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