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rwasp_chi_squared_tests.wasp

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Chi-Squared Test, McNemar Test, and Fisher Exact Test

Date of computation

Mon, 15 Dec 2014 18:15:00 +0000

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Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?v=date/2014/Dec/15/t1418667319lobcq2gdks8hata.htm/, Retrieved Tue, 26 May 2026 09:07:12 +0000

Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=268838, Retrieved Tue, 26 May 2026 09:07:12 +0000

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352

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-       [Chi-Squared Test, McNemar Test, and Fisher Exact Test] [] [2014-12-15 18:15:00] [6c0da333d5967ad7c023c95d07a1face] [Current]

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'D' "'A'" "'B'" "'A'" "'A'" "'A'" "'C'"

Summary of computational transaction
Raw Input	view raw input (R code)
Raw Output	view raw output of R engine
Computing time	2 seconds
R Server	'Sir Ronald Aylmer Fisher' @ fisher.wessa.net

\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 & 'Sir Ronald Aylmer Fisher' @ fisher.wessa.net \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=268838&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]'Sir Ronald Aylmer Fisher' @ fisher.wessa.net[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=268838&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=268838&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 Input	view raw input (R code)
Raw Output	view raw output of R engine
Computing time	2 seconds
R Server	'Sir Ronald Aylmer Fisher' @ fisher.wessa.net

Tabulation of Results
cat_AMS.A x cat_probabiltiy
	'A'	'C'	'D'
A	0	0	1
B	2	1	0
C	6	13	17
D	27	46	95

\begin{tabular}{lllllllll}
\hline
Tabulation of Results \tabularnewline
cat_AMS.A  x  cat_probabiltiy \tabularnewline
  & 'A' & 'C' & 'D' \tabularnewline
A & 0 & 0 & 1 \tabularnewline
B & 2 & 1 & 0 \tabularnewline
C & 6 & 13 & 17 \tabularnewline
D & 27 & 46 & 95 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=268838&T=1

[TABLE]
[ROW][C]Tabulation of Results[/C][/ROW]
[ROW][C]cat_AMS.A  x  cat_probabiltiy[/C][/ROW]
[ROW][C] [/C][C]'A'[/C][C]'C'[/C][C]'D'[/C][/ROW]
[C]A[/C][C]0[/C][C]0[/C][C]1[/C][/ROW]
[C]B[/C][C]2[/C][C]1[/C][C]0[/C][/ROW]
[C]C[/C][C]6[/C][C]13[/C][C]17[/C][/ROW]
[C]D[/C][C]27[/C][C]46[/C][C]95[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=268838&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=268838&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
cat_AMS.A x cat_probabiltiy
	'A'	'C'	'D'
A	0	0	1
B	2	1	0
C	6	13	17
D	27	46	95

Tabulation of Expected Results
cat_AMS.A x cat_probabiltiy
	'A'	'C'	'D'
A	0.17	0.29	0.54
B	0.5	0.87	1.63
C	6.06	10.38	19.56
D	28.27	48.46	91.27

\begin{tabular}{lllllllll}
\hline
Tabulation of Expected Results \tabularnewline
cat_AMS.A  x  cat_probabiltiy \tabularnewline
  & 'A' & 'C' & 'D' \tabularnewline
A & 0.17 & 0.29 & 0.54 \tabularnewline
B & 0.5 & 0.87 & 1.63 \tabularnewline
C & 6.06 & 10.38 & 19.56 \tabularnewline
D & 28.27 & 48.46 & 91.27 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=268838&T=2

[TABLE]
[ROW][C]Tabulation of Expected Results[/C][/ROW]
[ROW][C]cat_AMS.A  x  cat_probabiltiy[/C][/ROW]
[ROW][C] [/C][C]'A'[/C][C]'C'[/C][C]'D'[/C][/ROW]
[C]A[/C][C]0.17[/C][C]0.29[/C][C]0.54[/C][/ROW]
[C]B[/C][C]0.5[/C][C]0.87[/C][C]1.63[/C][/ROW]
[C]C[/C][C]6.06[/C][C]10.38[/C][C]19.56[/C][/ROW]
[C]D[/C][C]28.27[/C][C]48.46[/C][C]91.27[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=268838&T=2

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=268838&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
cat_AMS.A x cat_probabiltiy
	'A'	'C'	'D'
A	0.17	0.29	0.54
B	0.5	0.87	1.63
C	6.06	10.38	19.56
D	28.27	48.46	91.27

Statistical Results
Pearson's Chi-squared test with simulated p-value (based on 2000 replicates)
Exact Pearson Chi Square Statistic	8.25
P value	0.22

\begin{tabular}{lllllllll}
\hline
Statistical Results \tabularnewline
Pearson's Chi-squared test with simulated p-value
	 (based on 2000 replicates) \tabularnewline
Exact Pearson Chi Square Statistic & 8.25 \tabularnewline
P value & 0.22 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=268838&T=3

[TABLE]
[ROW][C]Statistical Results[/C][/ROW]
[ROW][C]Pearson's Chi-squared test with simulated p-value
	 (based on 2000 replicates)[/C][/ROW]
[ROW][C]Exact Pearson Chi Square Statistic[/C][C]8.25[/C][/ROW]
[ROW][C]P value[/C][C]0.22[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=268838&T=3

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=268838&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 simulated p-value (based on 2000 replicates)
Exact Pearson Chi Square Statistic	8.25
P value	0.22

Figure 1

PNG link

Postscript link

PDF link

Parameters (Session):

par1 = 1 ; par2 = 2 ; par3 = Exact Pearson Chi-Squared by Simulation ;

Parameters (R input):

par1 = 1 ; par2 = 6 ; par3 = Exact Pearson Chi-Squared by Simulation ;

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=='Fisher Exact Test') {
(cst <- fisher.test(table1))
}
if ((par3 != 'McNemar Chi-Squared') & (par3 != 'Fisher Exact Test')) {
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)
if (par3=='Pearson Chi-Squared') a<-table.element(a, 'Pearson Chi Square Statistic', 1, TRUE)
if (par3=='Exact Pearson Chi-Squared by Simulation') a<-table.element(a, 'Exact Pearson Chi Square Statistic', 1, TRUE)
if (par3=='McNemar Chi-Squared') a<-table.element(a, 'McNemar Chi Square Statistic', 1, TRUE)
if (par3=='Fisher Exact Test') a<-table.element(a, 'Odds Ratio', 1, TRUE)
if (par3=='Fisher Exact Test') {
if ((ncol(table1) == 2) & (nrow(table1) == 2)) {
a<-table.element(a, round(cst$estimate, digits=2), 1,FALSE)
} else {
a<-table.element(a, '--', 1,FALSE)
}
} else {
a<-table.element(a, round(cst$statistic, digits=2), 1,FALSE)
}
a<-table.row.end(a)
if(!simulate.p.value){
if(par3!='Fisher Exact Test') {
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')

Free Statistics

Description of Statistical Computation

Tree of Dependent Computations

Dataset

Tables (Output of Computation)

Figures (Output of Computation)

Input Parameters & R Code