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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 Test, McNemar Test, and Fisher Exact Test
Date of computationWed, 16 Nov 2011 10:23:12 -0500
Cite this page as followsStatistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?v=date/2011/Nov/16/t132145699904bly1tn7hofk40.htm/, Retrieved Fri, 19 Apr 2024 13:07:20 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=144044, Retrieved Fri, 19 Apr 2024 13:07:20 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact122

Tree of Dependent Computations

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] [] [2011-11-16 15:23:12] [abd09a04ddc145afbf81a913bd861ab8] [Current]
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Dataset

Dataseries X:
Download CSV
Histogram
Boxplots 
14	12	41	38
18	11	39	32
11	14	30	35
12	12	31	33
16	21	34	37
18	12	35	29
14	22	39	31
14	11	34	36
15	10	36	35
15	13	37	38
17	10	38	31
19	8	36	34
10	15	38	35
16	14	39	38
18	10	33	37
14	14	32	33
14	14	36	32
17	11	38	38
14	10	39	38
16	13	32	32
18	7	32	33
11	14	31	31
14	12	39	38
12	14	37	39
17	11	39	32
9	9	41	32
16	11	36	35
14	15	33	37
15	14	33	33
11	13	34	33
16	9	31	28
13	15	27	32
17	10	37	31
15	11	34	37
14	13	34	30
16	8	32	33
9	20	29	31
15	12	36	33
17	10	29	31
13	10	35	33
15	9	37	32
16	14	34	33
16	8	38	32
12	14	35	33
12	11	38	28
11	13	37	35
15	9	38	39
15	11	33	34
17	15	36	38
13	11	38	32
16	10	32	38
14	14	32	30
11	18	32	33
12	14	34	38
12	11	32	32
15	12	37	32
16	13	39	34
15	9	29	34
12	10	37	36
12	15	35	34
8	20	30	28
13	12	38	34
11	12	34	35
14	14	31	35
15	13	34	31
10	11	35	37
11	17	36	35
12	12	30	27
15	13	39	40
15	14	35	37
14	13	38	36
16	15	31	38
15	13	34	39
15	10	38	41
13	11	34	27
12	19	39	30
17	13	37	37
13	17	34	31
15	13	28	31
13	9	37	27
15	11	33	36
16	10	37	38
15	9	35	37
16	12	37	33
15	12	32	34
14	13	33	31
15	13	38	39
14	12	33	34
13	15	29	32
7	22	33	33
17	13	31	36
13	15	36	32
15	13	35	41
14	15	32	28
13	10	29	30
16	11	39	36
12	16	37	35
14	11	35	31
17	11	37	34
15	10	32	36
17	10	38	36
12	16	37	35
16	12	36	37
11	11	32	28
15	16	33	39
9	19	40	32
16	11	38	35
15	16	41	39
10	15	36	35
10	24	43	42
15	14	30	34
11	15	31	33
13	11	32	41
14	15	32	33
18	12	37	34
16	10	37	32
14	14	33	40
14	13	34	40
14	9	33	35
14	15	38	36
12	15	33	37
14	14	31	27
15	11	38	39
15	8	37	38
15	11	33	31
13	11	31	33
17	8	39	32
17	10	44	39
19	11	33	36
15	13	35	33
13	11	32	33
9	20	28	32
15	10	40	37
15	15	27	30
15	12	37	38
16	14	32	29
11	23	28	22
14	14	34	35
11	16	30	35
15	11	35	34
13	12	31	35
15	10	32	34
16	14	30	34
14	12	30	35
15	12	31	23
16	11	40	31
16	12	32	27
11	13	36	36
12	11	32	31
9	19	35	32
16	12	38	39
13	17	42	37
16	9	34	38
12	12	35	39
9	19	35	34
13	18	33	31
13	15	36	32
14	14	32	37
19	11	33	36
13	9	34	32
12	18	32	35
13	16	34	36

Tables (Output of Computation)





Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time0 seconds
R Server'Gwilym Jenkins' @ jenkins.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 & 0 seconds \tabularnewline
R Server & 'Gwilym Jenkins' @ jenkins.wessa.net \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=144044&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]0 seconds[/C][/ROW]
[ROW][C]R Server[/C][C]'Gwilym Jenkins' @ jenkins.wessa.net[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=144044&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=144044&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 time0 seconds
R Server'Gwilym Jenkins' @ jenkins.wessa.net


Figures (Output of Computation)

Input Parameters & R Code

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')