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ANALISIS DATA KUALITATIFX2test

Dr. Sunarjo, dr, MS, MSc

Departemen IKM-KP FK Unair

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X2test

= Chi - Suare

= Kai -Kuadrat

Kar! Pearson th "#$$

Untu% data &re%uensi 'Count( dari data %ate)ori 'tida% untu% * atau

proporsi(

D++ K+/0II. SK+1+ PUKU0+ /MI+1 3

L P

A

B

O

AB

SX

ta4e! - %ontin)ensi 3

r 5 c

o! - darah

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2. /0DI+1

STD - Ca

I II III

Rendah

Sedang

Tinggi

% - e%

6. I70 --8 data %ate)oriBSN

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KU++

". MU:I KSSU+I+ 3

'oodness o& Fit test( &re%uensi empiri% 7 hasi!pen)amatan sampe! ;s &re%uensi

teoriti%7diharap%an 'e5pected(di popu!asi

2. M++1ISIS

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Prinsip +na!isis 3

Mem4andin)%an &o;s &e--8 = X2

dst...X2e

22e2O

1e

21e1O

f

)ff(

f

)ff(2++=

= 2

22

)X(2Z

di i!hami

=ije

2ijeijO

f

)ff(2X

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C+++ 3

". X2= / 'no!( --8 mun)%in tapi jaran)

&o= &e--8 tida% cu%up 4u%ti meno!a%

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a4e! Kontin)ensi 2 5 2 3

>aria4e! +

I II

#a$ia%e& B

I a % a ' %

II ( d ( ' d

a ' ( % ' d a ' %

' ( 'd )N

N

)ba)(ca(

eaf ++=

N

)ba)(db(

eaf ++=

N

)dc)(ca(

eaf ++=

N

)dc)(db(

eaf

++

=

e 4

ec

ed

Kate)ori

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ta4e! 2 5 2 3

)db)(ca)(dc)(ba(

)bcad(N2 2

X ++++

=

P0S?+0++ X2test 3

0u!e o& the thum4 'Cochran "#@A( --8 ter%aitsamp!e siBe 3

". ida% ada &e" di semua se! 'no cell should

have an expected frequency less than 1(

2. Se!-se! den)an &e @ tida% 4o!eh me!e4ihi

2$ * dari semua se!

'no more than 20 percent of the cells should

have an expected frequency of less than 5

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Kedua sarat harus dipenuhi

- 9i!a sarat tida% dipenuhi --8 )a4un)%an den)an

se! 7 %ate)ori an) 4erdampin)an --8 &e

3 8

'Cochran( --8 asa! %ate)ori 4aru mempunai +0I.

- Pen))a4un)an 7 penederhanaan sampai ta4e! 2 5

2 --8 sarat 4e!um terpenuhi --8 FisherEs 5act

Pro4a4i!it est 'Fisher "#6(

6. D.F 3

DF = r - " --8 )oodness o& &it test

DF = 'r - "('c - "( --8 X2%omparasi X2%ore!asi

DF ma%in 4esar --8 ni!ai tit% %ritis menin)%at

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=

=e

2eo

f

)N5.0ff(2

1DFcorr

X

)db)(ca)(dc)(ba(

)N5.0bcad(N2

corr

2X ++++

=

A. K

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K/MP+0+SI S+MP1 - P/PU1+SI

'//DSS o& FI S X2(

Kasus

Pene!itian )o!on)an darah pada "$$ oran),hasi!

+ = 2$ oran), 9 = "@, +9 = @ H / = $

Di%etahui se4aran di popu!asi 3

/ = @$ *, + = 2$ *, 9 =2$ * H +9 = "$ *

+pa hasi! pene!itian terse4ut sesuai den)andistri4usi di popu!asi J

= $.$@

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U:I K/MP+0+SI X2

Ca &a*% U&( Pe+t

A 5 /"

B 5 2"

O 5 5

AB 1" 05

1"" 1""

o!- darah

+pa%ah terdapat per4edaan distri4usi )o! - darah

antara %e!ompo% Ca !am4un) dan UP J

X2= @.62 L @.62 L A.@ L A.@ L $ L $ L A L A

= 2.@2

X2ta4e! G DF = 6 G = $.$@= ."