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Author's title

Author

*The author of this computation has been verified*

R Software Module

rwasp_chi_squared_tests.wasp

Title produced by software

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

Date of computation

Thu, 20 Dec 2012 11:01:39 -0500

Cite this page as follows

Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?v=date/2012/Dec/20/t1356019341dx9m4t0dust6mww.htm/, Retrieved Wed, 11 Feb 2026 02:05:29 +0000

Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=202820, Retrieved Wed, 11 Feb 2026 02:05:29 +0000

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Original text written by user:

IsPrivate?

No (this computation is public)

User-defined keywords

Estimated Impact

352

Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)

-       [Chi-Squared Test, McNemar Test, and Fisher Exact Test] [Chi squared T20] [2012-12-20 16:01:39] [93313045cc3d40395d585d4a544cae6d] [Current]
- R P     [Chi-Squared Test, McNemar Test, and Fisher Exact Test] [Chi squared by si...] [2012-12-20 16:15:50] [52164bed4574d5115e7a46a92cffd46b] 
- R  D    [Chi-Squared Test, McNemar Test, and Fisher Exact Test] [Chi Squared T40] [2012-12-21 17:40:16] [52164bed4574d5115e7a46a92cffd46b] 
-   P       [Chi-Squared Test, McNemar Test, and Fisher Exact Test] [Chi Squared T40 b...] [2012-12-21 17:44:14] [52164bed4574d5115e7a46a92cffd46b] 
- RMPD      [One-Way-Between-Groups ANOVA- Free Statistics Software (Calculator)] [One way Anova T20] [2012-12-21 18:09:27] [52164bed4574d5115e7a46a92cffd46b] 
- RMPD      [One-Way-Between-Groups ANOVA- Free Statistics Software (Calculator)] [One way Anova T40] [2012-12-21 18:32:13] [52164bed4574d5115e7a46a92cffd46b] 
- RMPD      [Multiple Regression] [Multiple Regressi...] [2012-12-21 18:41:33] [52164bed4574d5115e7a46a92cffd46b] 
- RMPD      [Multiple Regression] [Multiple Regressi...] [2012-12-21 18:55:15] [52164bed4574d5115e7a46a92cffd46b] 

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Dataseries X:

Download CSV

Histogram

Boxplots

NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'Yes'
NA	'No'
NA	'No'
NA	'Yes'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'Yes'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'Yes'
NA	'No'
NA	'Yes'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'Yes'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'Yes'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'Yes'
NA	'No'
NA	'No'
NA	'No'
NA	'No'
NA	'Yes'
NA	'No'
NA	'No'
'NoTreatment'	'No'
'Treatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'Treatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'Treatment'	'No'
'NoTreatment'	'No'
'Treatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'Treatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'Treatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'Treatment'	'No'
'Treatment'	'No'
'NoTreatment'	'No'
'Treatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'Treatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'Treatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'Treatment'	'No'
'Treatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'Yes'
'Treatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'Treatment'	'No'
'Treatment'	'No'
'Treatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'No'
'NoTreatment'	'Yes'
'NoTreatment'	'Yes'
'NoTreatment'	'No'

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	'George Udny Yule' @ yule.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 & 'George Udny Yule' @ yule.wessa.net \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=202820&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]'George Udny Yule' @ yule.wessa.net[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=202820&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=202820&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	'George Udny Yule' @ yule.wessa.net

Tabulation of Results
T20 x Correct
	No	Yes
NoTreatment	48	3
Treatment	17	0

\begin{tabular}{lllllllll}
\hline
Tabulation of Results \tabularnewline
T20  x  Correct \tabularnewline
  & No & Yes \tabularnewline
NoTreatment & 48 & 3 \tabularnewline
Treatment & 17 & 0 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=202820&T=1

[TABLE]
[ROW][C]Tabulation of Results[/C][/ROW]
[ROW][C]T20  x  Correct[/C][/ROW]
[ROW][C] [/C][C]No[/C][C]Yes[/C][/ROW]
[C]NoTreatment[/C][C]48[/C][C]3[/C][/ROW]
[C]Treatment[/C][C]17[/C][C]0[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=202820&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=202820&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
T20 x Correct
	No	Yes
NoTreatment	48	3
Treatment	17	0

Tabulation of Expected Results
T20 x Correct
	No	Yes
NoTreatment	48.75	2.25
Treatment	16.25	0.75

\begin{tabular}{lllllllll}
\hline
Tabulation of Expected Results \tabularnewline
T20  x  Correct \tabularnewline
  & No & Yes \tabularnewline
NoTreatment & 48.75 & 2.25 \tabularnewline
Treatment & 16.25 & 0.75 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=202820&T=2

[TABLE]
[ROW][C]Tabulation of Expected Results[/C][/ROW]
[ROW][C]T20  x  Correct[/C][/ROW]
[ROW][C] [/C][C]No[/C][C]Yes[/C][/ROW]
[C]NoTreatment[/C][C]48.75[/C][C]2.25[/C][/ROW]
[C]Treatment[/C][C]16.25[/C][C]0.75[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=202820&T=2

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=202820&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
T20 x Correct
	No	Yes
NoTreatment	48.75	2.25
Treatment	16.25	0.75

Statistical Results
Pearson's Chi-squared test with Yates' continuity correction
Pearson Chi Square Statistic	0.12
Degrees of Freedom	1
P value	0.73

\begin{tabular}{lllllllll}
\hline
Statistical Results \tabularnewline
Pearson's Chi-squared test with Yates' continuity correction \tabularnewline
Pearson Chi Square Statistic & 0.12 \tabularnewline
Degrees of Freedom & 1 \tabularnewline
P value & 0.73 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=202820&T=3

[TABLE]
[ROW][C]Statistical Results[/C][/ROW]
[ROW][C]Pearson's Chi-squared test with Yates' continuity correction[/C][/ROW]
[ROW][C]Pearson Chi Square Statistic[/C][C]0.12[/C][/ROW]
[ROW][C]Degrees of Freedom[/C][C]1[/C][/ROW]
[ROW][C]P value[/C][C]0.73[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=202820&T=3

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=202820&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
Pearson Chi Square Statistic	0.12
Degrees of Freedom	1
P value	0.73

Figure 1

PNG link

Postscript link

PDF link

Parameters (Session):

par1 = 1 ; par2 = 2 ; par3 = Pearson Chi-Squared ;

Parameters (R input):

par1 = 1 ; par2 = 2 ; 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=='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