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Description of Statistical Computation

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 computationTue, 30 Nov 2010 10:47:26 +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/30/t1291113981aqvgh2bqxjvsrd6.htm/, Retrieved Tue, 17 Jun 2025 18:37:59 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=103314, Retrieved Tue, 17 Jun 2025 18:37:59 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact264

Tree of Dependent Computations

Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)
-     [Chi-Squared and McNemar Tests] [] [2010-11-16 14:33:59] [b98453cac15ba1066b407e146608df68]
-   PD  [Chi-Squared and McNemar Tests] [Chi-squared] [2010-11-30 10:12:34] [c1605865773cc027e55b238d879a644c]
-    D      [Chi-Squared and McNemar Tests] [chi-squared high ...] [2010-11-30 10:47:26] [606daa46683961cdd2a740c3e0051d62] [Current]
-             [Chi-Squared Test, McNemar Test, and Fisher Exact Test] [Chi-squared test ...] [2010-12-18 13:53:35] [d7a673bc47e3999e70f4e1e2276e5189]
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Dataset

Dataseries X:
Download CSV
Histogram
Boxplots 
'Low'	'Low'
'Low'	'Low'
'High'	'High'
'Low'	'Low'
'High'	'High'
'High'	'High'
'Low'	'Low'
'Low'	'Low'
'High'	'Low'
'High'	'High'
'High'	'High'
'Low'	'Low'
'High'	'High'
'High'	'Low'
'High'	'High'
'High'	'Low'
'High'	'High'
'High'	'High'
'High'	'High'
'Low'	'Low'
'High'	'High'
'High'	'High'
'High'	'High'
'Low'	'High'
'High'	'High'
'High'	'High'
'High'	'High'
'High'	'High'
'High'	'High'
'High'	'High'
'High'	'High'
'Low'	'High'
'High'	'High'
'High'	'High'
'Low'	'Low'
'Low'	'Low'
'Low'	'Low'
'Low'	'Low'
'Low'	'Low'
'Low'	'Low'
'Low'	'Low'
'Low'	'Low'
'Low'	'Low'
'Low'	'Low'
'Low'	'Low'
'Low'	'Low'
'Low'	'Low'
'Low'	'Low'
'Low'	'Low'
'Low'	'Low'
'High'	'High'
'Low'	'High'
'Low'	'High'
'High'	'High'
'High'	'Low'

Tables (Output of Computation)





Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time4 seconds
R Server'George Udny Yule' @ 72.249.76.132

\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 & 4 seconds \tabularnewline
R Server & 'George Udny Yule' @ 72.249.76.132 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=103314&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]4 seconds[/C][/ROW]
[ROW][C]R Server[/C][C]'George Udny Yule' @ 72.249.76.132[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=103314&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=103314&T=0

As an alternative you can also use a QR Code:  
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 time4 seconds
R Server'George Udny Yule' @ 72.249.76.132






Tabulation of Results
Uitvoer x Invoer
HighLow
High244
Low423

\begin{tabular}{lllllllll}
\hline
Tabulation of Results \tabularnewline
Uitvoer  x  Invoer \tabularnewline
  & High & Low \tabularnewline
High & 24 & 4 \tabularnewline
Low & 4 & 23 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=103314&T=1

[TABLE]
[ROW][C]Tabulation of Results[/C][/ROW]
[ROW][C]Uitvoer  x  Invoer[/C][/ROW]
[ROW][C] [/C][C]High[/C][C]Low[/C][/ROW]
[C]High[/C][C]24[/C][C]4[/C][/ROW]
[C]Low[/C][C]4[/C][C]23[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=103314&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=103314&T=1

As an alternative you can also use a QR Code:  
QR Code


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

Tabulation of Results
Uitvoer x Invoer
HighLow
High244
Low423






Tabulation of Expected Results
Uitvoer x Invoer
HighLow
High14.2513.75
Low13.7513.25

\begin{tabular}{lllllllll}
\hline
Tabulation of Expected Results \tabularnewline
Uitvoer  x  Invoer \tabularnewline
  & High & Low \tabularnewline
High & 14.25 & 13.75 \tabularnewline
Low & 13.75 & 13.25 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=103314&T=2

[TABLE]
[ROW][C]Tabulation of Expected Results[/C][/ROW]
[ROW][C]Uitvoer  x  Invoer[/C][/ROW]
[ROW][C] [/C][C]High[/C][C]Low[/C][/ROW]
[C]High[/C][C]14.25[/C][C]13.75[/C][/ROW]
[C]Low[/C][C]13.75[/C][C]13.25[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=103314&T=2

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=103314&T=2

As an alternative you can also use a QR Code:  
QR Code


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

Tabulation of Expected Results
Uitvoer x Invoer
HighLow
High14.2513.75
Low13.7513.25






Statistical Results
Pearson's Chi-squared test with simulated p-value (based on 2000 replicates)
Chi Square Statistic27.65
P value0

\begin{tabular}{lllllllll}
\hline
Statistical Results \tabularnewline
Pearson's Chi-squared test with simulated p-value
	 (based on 2000 replicates) \tabularnewline
Chi Square Statistic & 27.65 \tabularnewline
P value & 0 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=103314&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]Chi Square Statistic[/C][C]27.65[/C][/ROW]
[ROW][C]P value[/C][C]0[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=103314&T=3

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=103314&T=3

As an alternative you can also use a QR Code:  
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)
Chi Square Statistic27.65
P value0


Figures (Output of Computation)

Input Parameters & R Code

Parameters (Session):
par1 = 1 ; par2 = 2 ; par3 = Exact Pearson Chi-Squared by Simulation ;
Parameters (R input):
par1 = 1 ; par2 = 2 ; 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 != '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')