Free Statistics

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Author's title

Author*The author of this computation has been verified*
R Software Modulerwasp_chi_squared_tests.wasp
Title produced by softwareChi-Squared and McNemar Tests
Date of computationFri, 12 Nov 2010 07:59:36 +0000
Cite this page as followsStatistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?v=date/2010/Nov/12/t1289548696mgrfszqk0wnhi5p.htm/, Retrieved Tue, 30 Apr 2024 16:00:44 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=94000, Retrieved Tue, 30 Apr 2024 16:00:44 +0000
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Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact123
Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)
F       [Chi-Squared and McNemar Tests] [] [2010-11-12 07:59:36] [cda497ce08bc921f0aec22acd67c882b] [Current]
Feedback Forum
2010-11-23 17:20:18 [411b43619fc9db329bbcdbf7261c55fb] [reply
De student heeft hier de correcte berekening gemaakt. Maar hij zegt weer dat er een verband is, en dit is niet correct. Tevens zegt hij dat er een significant verschil, maar tegelijkertijd ook geen significant verschil. Dat zorgt voor verwarring, bij deze berekening is er duidelijk GEEN significant verschil. Het is logisch dat er geen verband bestaat, aangezien de p-waarde hier 99% bedraagt (deze is hoger dan de type 1 fout (5%) die je kan stellen). Bijgevolg kunnen we met grote zekerheid concluderen dat de vastgestelde verschillen hier volledig toevallig zijn.

De student had dezelfde berekening ook kunnen doen met de verfijnde oplossing. Daarom geef ik de student mijn berekeningen mee, om te kunnen vergelijken. (bekijk http://www.freestatistics.org/blog/index.php?v=date/2010/Nov/20/t1290249860riy0t2iiiij5pzr.htm/
voor A/B/C/D) Hier is de cell count wel OK, daarom kunnen we zowel de “Pearson Chi-squared test” als de “Exact Pearson Chi-squared by simulation” gebruiken. Deze berekening kan je op dezelfde wijze interpreteren als de groffe oplossing (HI/LO). Hier zien we een p-waarde van 90%, dus hier waren we al zeker dat er geen verband bestond, dit gegeven werd nog eens extra bevestigd bij de groffe oplossing (zie hierboven).

Post a new message
Dataseries X:
'HI'	'HI'	'HI'
'LO'	'HI'	'LO'
'HI'	'LO'	'HI'
'LO'	'LO'	'HI'
'HI'	'HI'	'HI'
'LO'	'HI'	'HI'
'LO'	'HI'	'HI'
'HI'	'HI'	'LO'
'HI'	'HI'	'LO'
'HI'	'HI'	'HI'
'LO'	'HI'	'LO'
'HI'	'HI'	'LO'
'HI'	'LO'	'HI'
'HI'	'HI'	'HI'
'HI'	'HI'	'LO'
'LO'	'HI'	'HI'
'LO'	'HI'	'HI'
'HI'	'HI'	'LO'
'HI'	'HI'	'LO'
'LO'	'HI'	'HI'
'LO'	'HI'	'LO'
'LO'	'LO'	'HI'
'HI'	'HI'	'HI'
'HI'	'LO'	'HI'
'LO'	'HI'	'LO'
'LO'	'LO'	'LO'
'HI'	'HI'	'LO'
'HI'	'HI'	'HI'
'LO'	'HI'	'HI'
'LO'	'LO'	'HI'
'LO'	'HI'	'LO'
'LO'	'LO'	'HI'
'LO'	'HI'	'LO'
'HI'	'HI'	'LO'
'LO'	'HI'	'HI'
'LO'	'HI'	'LO'
'LO'	'LO'	'HI'
'LO'	'HI'	'HI'
'LO'	'HI'	'LO'
'LO'	'LO'	'LO'
'LO'	'HI'	'LO'
'LO'	'HI'	'HI'
'LO'	'HI'	'LO'
'LO'	'LO'	'HI'
'LO'	'LO'	'LO'
'HI'	'LO'	'HI'
'HI'	'HI'	'LO'
'HI'	'HI'	'LO'
'HI'	'HI'	'HI'
'LO'	'LO'	'LO'
'HI'	'HI'	'LO'
'LO'	'HI'	'HI'
'LO'	'LO'	'HI'
'HI'	'LO'	'HI'
'LO'	'LO'	'LO'
'LO'	'HI'	'HI'
'HI'	'HI'	'HI'
'HI'	'HI'	'LO'
'HI'	'LO'	'LO'
'HI'	'LO'	'HI'
'LO'	'LO'	'HI'
'HI'	'LO'	'HI'
'HI'	'LO'	'HI'
'HI'	'HI'	'HI'
'LO'	'HI'	'HI'
'HI'	'LO'	'LO'
'HI'	'LO'	'HI'
'LO'	'LO'	'HI'
'HI'	'HI'	'HI'
'HI'	'HI'	'HI'
'HI'	'HI'	'HI'
'HI'	'HI'	'HI'
'HI'	'HI'	'HI'
'HI'	'HI'	'LO'
'LO'	'LO'	'LO'
'LO'	'LO'	'HI'
'HI'	'HI'	'HI'
'LO'	'LO'	'HI'
'LO'	'HI'	'HI'
'LO'	'LO'	'LO'
'HI'	'HI'	'LO'
'HI'	'HI'	'LO'
'HI'	'HI'	'LO'
'LO'	'HI'	'HI'
'HI'	'HI'	'HI'
'LO'	'HI'	'HI'
'HI'	'HI'	'HI'
'HI'	'HI'	'HI'
'LO'	'LO'	'HI'
'LO'	'LO'	'HI'
'HI'	'HI'	'HI'
'LO'	'LO'	'HI'
'HI'	'HI'	'HI'
'LO'	'HI'	'HI'
'LO'	'LO'	'LO'
'HI'	'HI'	'LO'
'HI'	'LO'	'HI'
'LO'	'HI'	'LO'
'HI'	'HI'	'LO'
'HI'	'HI'	'LO'
'HI'	'HI'	'LO'
'HI'	'LO'	'HI'
'HI'	'HI'	'HI'
'LO'	'LO'	'LO'
'HI'	'HI'	'HI'
'LO'	'LO'	'HI'
'HI'	'HI'	'LO'
'HI'	'HI'	'HI'
'HI'	'LO'	'HI'
'HI'	'LO'	'HI'
'HI'	'HI'	'HI'
'LO'	'LO'	'HI'
'HI'	'LO'	'LO'
'LO'	'HI'	'HI'
'HI'	'HI'	'HI'
'LO'	'HI'	'LO'
'HI'	'HI'	'HI'
'HI'	'HI'	'HI'
'HI'	'HI'	'LO'
'HI'	'HI'	'HI'
'HI'	'LO'	'HI'
'LO'	'HI'	'HI'
'HI'	'HI'	'LO'
'HI'	'HI'	'LO'
'LO'	'HI'	'LO'
'LO'	'LO'	'LO'
'LO'	'HI'	'LO'
'HI'	'HI'	'LO'
'HI'	'HI'	'LO'
'LO'	'HI'	'HI'
'LO'	'LO'	'LO'
'LO'	'LO'	'HI'
'HI'	'HI'	'LO'
'LO'	'HI'	'HI'
'HI'	'HI'	'HI'
'LO'	'HI'	'HI'
'LO'	'LO'	'HI'
'HI'	'HI'	'HI'
'HI'	'LO'	'HI'
'HI'	'HI'	'LO'
'HI'	'LO'	'HI'
'HI'	'HI'	'LO'
'HI'	'HI'	'HI'
'HI'	'HI'	'HI'
'LO'	'HI'	'HI'
'LO'	'HI'	'LO'
'LO'	'HI'	'HI'
'HI'	'LO'	'HI'
'LO'	'LO'	'LO'
'LO'	'LO'	'HI'
'HI'	'HI'	'HI'
'HI'	'LO'	'HI'
'HI'	'HI'	'LO'
'HI'	'LO'	'HI'
'HI'	'LO'	'HI'
'LO'	'LO'	'HI'
'LO'	'LO'	'HI'
'HI'	'HI'	'HI'
'HI'	'HI'	'LO'
'LO'	'LO'	'LO'
'HI'	'LO'	'HI'
'HI'	'LO'	'HI'




Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time2 seconds
R Server'RServer@AstonUniversity' @ vre.aston.ac.uk

\begin{tabular}{lllllllll}
\hline
Summary of computational transaction \tabularnewline
Raw Input & view raw input (R code)  \tabularnewline
Raw Output & view raw output of R engine  \tabularnewline
Computing time & 2 seconds \tabularnewline
R Server & 'RServer@AstonUniversity' @ vre.aston.ac.uk \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=94000&T=0

[TABLE]
[ROW][C]Summary of computational transaction[/C][/ROW]
[ROW][C]Raw Input[/C][C]view raw input (R code) [/C][/ROW]
[ROW][C]Raw Output[/C][C]view raw output of R engine [/C][/ROW]
[ROW][C]Computing time[/C][C]2 seconds[/C][/ROW]
[ROW][C]R Server[/C][C]'RServer@AstonUniversity' @ vre.aston.ac.uk[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=94000&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=94000&T=0

As an alternative you can also use a QR Code:  

The GUIDs for individual cells are displayed in the table below:

Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time2 seconds
R Server'RServer@AstonUniversity' @ vre.aston.ac.uk







Tabulation of Results
Separate x Depression
HILO
HI5634
LO4428

\begin{tabular}{lllllllll}
\hline
Tabulation of Results \tabularnewline
Separate  x  Depression \tabularnewline
  & HI & LO \tabularnewline
HI & 56 & 34 \tabularnewline
LO & 44 & 28 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=94000&T=1

[TABLE]
[ROW][C]Tabulation of Results[/C][/ROW]
[ROW][C]Separate  x  Depression[/C][/ROW]
[ROW][C] [/C][C]HI[/C][C]LO[/C][/ROW]
[C]HI[/C][C]56[/C][C]34[/C][/ROW]
[C]LO[/C][C]44[/C][C]28[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=94000&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=94000&T=1

As an alternative you can also use a QR Code:  

The GUIDs for individual cells are displayed in the table below:

Tabulation of Results
Separate x Depression
HILO
HI5634
LO4428







Tabulation of Expected Results
Separate x Depression
HILO
HI55.5634.44
LO44.4427.56

\begin{tabular}{lllllllll}
\hline
Tabulation of Expected Results \tabularnewline
Separate  x  Depression \tabularnewline
  & HI & LO \tabularnewline
HI & 55.56 & 34.44 \tabularnewline
LO & 44.44 & 27.56 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=94000&T=2

[TABLE]
[ROW][C]Tabulation of Expected Results[/C][/ROW]
[ROW][C]Separate  x  Depression[/C][/ROW]
[ROW][C] [/C][C]HI[/C][C]LO[/C][/ROW]
[C]HI[/C][C]55.56[/C][C]34.44[/C][/ROW]
[C]LO[/C][C]44.44[/C][C]27.56[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=94000&T=2

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=94000&T=2

As an alternative you can also use a QR Code:  

The GUIDs for individual cells are displayed in the table below:

Tabulation of Expected Results
Separate x Depression
HILO
HI55.5634.44
LO44.4427.56







Statistical Results
Pearson's Chi-squared test with Yates' continuity correction
Chi Square Statistic0
Degrees of Freedom1
P value0.99

\begin{tabular}{lllllllll}
\hline
Statistical Results \tabularnewline
Pearson's Chi-squared test with Yates' continuity correction \tabularnewline
Chi Square Statistic & 0 \tabularnewline
Degrees of Freedom & 1 \tabularnewline
P value & 0.99 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=94000&T=3

[TABLE]
[ROW][C]Statistical Results[/C][/ROW]
[ROW][C]Pearson's Chi-squared test with Yates' continuity correction[/C][/ROW]
[ROW][C]Chi Square Statistic[/C][C]0[/C][/ROW]
[ROW][C]Degrees of Freedom[/C][C]1[/C][/ROW]
[ROW][C]P value[/C][C]0.99[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=94000&T=3

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=94000&T=3

As an alternative you can also use a QR Code:  

The GUIDs for individual cells are displayed in the table below:

Statistical Results
Pearson's Chi-squared test with Yates' continuity correction
Chi Square Statistic0
Degrees of Freedom1
P value0.99



Parameters (Session):
par1 = 1 ; par2 = 3 ; par3 = Pearson Chi-Squared ;
Parameters (R input):
par1 = 1 ; par2 = 3 ; par3 = Pearson Chi-Squared ;
R code (references can be found in the software module):
library(vcd)
cat1 <- as.numeric(par1) #
cat2<- as.numeric(par2) #
simulate.p.value=FALSE
if (par3 == 'Exact Pearson Chi-Squared by Simulation') simulate.p.value=TRUE
x <- t(x)
(z <- array(unlist(x),dim=c(length(x[,1]),length(x[1,]))))
(table1 <- table(z[,cat1],z[,cat2]))
(V1<-dimnames(y)[[1]][cat1])
(V2<-dimnames(y)[[1]][cat2])
bitmap(file='pic1.png')
assoc(ftable(z[,cat1],z[,cat2],row.vars=1,dnn=c(V1,V2)),shade=T)
dev.off()
load(file='createtable')
a<-table.start()
a<-table.row.start(a)
a<-table.element(a,'Tabulation of Results',ncol(table1)+1,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,paste(V1,' x ', V2),ncol(table1)+1,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a, ' ', 1,TRUE)
for(nc in 1:ncol(table1)){
a<-table.element(a, colnames(table1)[nc], 1, TRUE)
}
a<-table.row.end(a)
for(nr in 1:nrow(table1) ){
a<-table.element(a, rownames(table1)[nr], 1, TRUE)
for(nc in 1:ncol(table1) ){
a<-table.element(a, table1[nr, nc], 1, FALSE)
}
a<-table.row.end(a)
}
a<-table.end(a)
table.save(a,file='mytable.tab')
(cst<-chisq.test(table1, simulate.p.value=simulate.p.value) )
if (par3 == 'McNemar Chi-Squared') {
(cst <- mcnemar.test(table1))
}
if (par3 != 'McNemar Chi-Squared') {
a<-table.start()
a<-table.row.start(a)
a<-table.element(a,'Tabulation of Expected Results',ncol(table1)+1,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,paste(V1,' x ', V2),ncol(table1)+1,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a, ' ', 1,TRUE)
for(nc in 1:ncol(table1)){
a<-table.element(a, colnames(table1)[nc], 1, TRUE)
}
a<-table.row.end(a)
for(nr in 1:nrow(table1) ){
a<-table.element(a, rownames(table1)[nr], 1, TRUE)
for(nc in 1:ncol(table1) ){
a<-table.element(a, round(cst$expected[nr, nc], digits=2), 1, FALSE)
}
a<-table.row.end(a)
}
a<-table.end(a)
table.save(a,file='mytable1.tab')
}
a<-table.start()
a<-table.row.start(a)
a<-table.element(a,'Statistical Results',2,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a, cst$method, 2,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a, 'Chi Square Statistic', 1, TRUE)
a<-table.element(a, round(cst$statistic, digits=2), 1,FALSE)
a<-table.row.end(a)
if(!simulate.p.value){
a<-table.row.start(a)
a<-table.element(a, 'Degrees of Freedom', 1, TRUE)
a<-table.element(a, cst$parameter, 1,FALSE)
a<-table.row.end(a)
}
a<-table.row.start(a)
a<-table.element(a, 'P value', 1, TRUE)
a<-table.element(a, round(cst$p.value, digits=2), 1,FALSE)
a<-table.row.end(a)
a<-table.end(a)
table.save(a,file='mytable2.tab')