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Description of Statistical Computation

Author's title

Author*The author of this computation has been verified*
R Software Modulerwasp_One Factor ANOVA.wasp
Title produced by softwareOne-Way-Between-Groups ANOVA- Free Statistics Software (Calculator)
Date of computationSun, 06 Nov 2011 07:58:23 -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/06/t132058431833lqqkn4obt17d8.htm/, Retrieved Sat, 07 Feb 2026 03:46:12 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=139940, Retrieved Sat, 07 Feb 2026 03:46:12 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact469

Tree of Dependent Computations

Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)
-     [Paired and Unpaired Two Samples Tests about the Mean] [Q1 Paired] [2011-11-06 11:28:18] [9d4f280afcb4ecc352d7c6f913a0a151]
-    D  [Paired and Unpaired Two Samples Tests about the Mean] [Q5 E Treatment] [2011-11-06 12:24:08] [9d4f280afcb4ecc352d7c6f913a0a151]
- RM D      [One-Way-Between-Groups ANOVA- Free Statistics Software (Calculator)] [Q6 Korte Termijn ...] [2011-11-06 12:58:23] [2a6d487209befbc7c5ce02a41ecac161] [Current]
- R  D        [One-Way-Between-Groups ANOVA- Free Statistics Software (Calculator)] [Q6 Korte Termijn ...] [2011-11-06 12:59:11] [9d4f280afcb4ecc352d7c6f913a0a151]
-    D          [One-Way-Between-Groups ANOVA- Free Statistics Software (Calculator)] [] [2011-11-06 13:08:11] [9d4f280afcb4ecc352d7c6f913a0a151]
-   PD            [One-Way-Between-Groups ANOVA- Free Statistics Software (Calculator)] [] [2011-11-08 11:35:29] [ad2d4c5ace9fa07b356a7b5098237581]
- R PD            [One-Way-Between-Groups ANOVA- Free Statistics Software (Calculator)] [Comp 5 Q6] [2012-10-27 16:41:35] [8eb8d17c2ec8c4c2abfbcde955accee7]
- R PD            [One-Way-Between-Groups ANOVA- Free Statistics Software (Calculator)] [Comp 5 Q6 LT] [2012-10-27 16:59:41] [8eb8d17c2ec8c4c2abfbcde955accee7]
- R PD            [One-Way-Between-Groups ANOVA- Free Statistics Software (Calculator)] [Comp 5 Q7 KT] [2012-10-27 17:04:16] [8eb8d17c2ec8c4c2abfbcde955accee7]
- R PD            [One-Way-Between-Groups ANOVA- Free Statistics Software (Calculator)] [one-way anova - Q6] [2012-10-28 10:44:20] [b1dfdbefa55399d24de0a14859302915]
- RMPD            [Two-Way ANOVA] [two-way anova - Q8] [2012-10-28 11:08:15] [b1dfdbefa55399d24de0a14859302915]
- R PD            [One-Way-Between-Groups ANOVA- Free Statistics Software (Calculator)] [Vraag 6 KT] [2013-11-05 14:05:21] [05c505647875c49566670852d268183d]
- R PD            [One-Way-Between-Groups ANOVA- Free Statistics Software (Calculator)] [Vraag 6 LT] [2013-11-05 14:17:32] [05c505647875c49566670852d268183d]
- R PD            [One-Way-Between-Groups ANOVA- Free Statistics Software (Calculator)] [Vraag 7] [2013-11-05 14:38:35] [05c505647875c49566670852d268183d]
- R PD            [One-Way-Between-Groups ANOVA- Free Statistics Software (Calculator)] [Vraag 7 LT] [2013-11-05 14:48:47] [05c505647875c49566670852d268183d]
- RMPD            [Two-Way ANOVA] [Vraag 8] [2013-11-05 14:54:58] [05c505647875c49566670852d268183d]
- R  D        [One-Way-Between-Groups ANOVA- Free Statistics Software (Calculator)] [Q6 Korte Termijn ...] [2011-11-06 13:00:04] [9d4f280afcb4ecc352d7c6f913a0a151]
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Dataset

Dataseries X:
Download CSV
Histogram
Boxplots 
1	1
1	1
0	1
0	0
1	1
1	1
1	1
0	1
0	1
1	1
0	0
0	1
0	1
0	1
0	0
1	1
1	1
1	1
0	1
0	0
1	1
1	1
0	0
1	0
1	1
1	0
1	1
0	0
0	0
1	1
1	0
1	1
0	0
0	0
0	0
1	1
1	1

Tables (Output of Computation)





Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time1 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 & 1 seconds \tabularnewline
R Server & 'Gwilym Jenkins' @ jenkins.wessa.net \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=139940&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]1 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=139940&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=139940&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 time1 seconds
R Server'Gwilym Jenkins' @ jenkins.wessa.net






ANOVA Model
pre ~ post1
means0.2310.478

\begin{tabular}{lllllllll}
\hline
ANOVA Model \tabularnewline
pre  ~  post1 \tabularnewline
means & 0.231 & 0.478 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=139940&T=1

[TABLE]
[ROW][C]ANOVA Model[/C][/ROW]
[ROW][C]pre  ~  post1[/C][/ROW]
[ROW][C]means[/C][C]0.231[/C][C]0.478[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=139940&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=139940&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:

ANOVA Model
pre ~ post1
means0.2310.478






ANOVA Statistics
DfSum SqMean SqF valuePr(>F)
post111.9231.9239.2640.004
Residuals357.2660.208 

\begin{tabular}{lllllllll}
\hline
ANOVA Statistics \tabularnewline
  & Df & Sum Sq & Mean Sq & F value & Pr(>F) \tabularnewline
post1 & 1 & 1.923 & 1.923 & 9.264 & 0.004 \tabularnewline
Residuals & 35 & 7.266 & 0.208 &   &   \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=139940&T=2

[TABLE]
[ROW][C]ANOVA Statistics[/C][/ROW]
[ROW][C] [/C][C]Df[/C][C]Sum Sq[/C][C]Mean Sq[/C][C]F value[/C][C]Pr(>F)[/C][/ROW]
[ROW][C]post1[/C][C]1[/C][C]1.923[/C][C]1.923[/C][C]9.264[/C][C]0.004[/C][/ROW]
[ROW][C]Residuals[/C][C]35[/C][C]7.266[/C][C]0.208[/C][C] [/C][C] [/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=139940&T=2

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=139940&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:

ANOVA Statistics
DfSum SqMean SqF valuePr(>F)
post111.9231.9239.2640.004
Residuals357.2660.208






Tukey Honest Significant Difference Comparisons
difflwruprp adj
1-00.4780.1590.7960.004

\begin{tabular}{lllllllll}
\hline
Tukey Honest Significant Difference Comparisons \tabularnewline
  & diff & lwr & upr & p adj \tabularnewline
1-0 & 0.478 & 0.159 & 0.796 & 0.004 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=139940&T=3

[TABLE]
[ROW][C]Tukey Honest Significant Difference Comparisons[/C][/ROW]
[ROW][C] [/C][C]diff[/C][C]lwr[/C][C]upr[/C][C]p adj[/C][/ROW]
[ROW][C]1-0[/C][C]0.478[/C][C]0.159[/C][C]0.796[/C][C]0.004[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=139940&T=3

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=139940&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:

Tukey Honest Significant Difference Comparisons
difflwruprp adj
1-00.4780.1590.7960.004






Levenes Test for Homogeneity of Variance
DfF valuePr(>F)
Group10.1510.7
35 

\begin{tabular}{lllllllll}
\hline
Levenes Test for Homogeneity of Variance \tabularnewline
  & Df & F value & Pr(>F) \tabularnewline
Group & 1 & 0.151 & 0.7 \tabularnewline
  & 35 &   &   \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=139940&T=4

[TABLE]
[ROW][C]Levenes Test for Homogeneity of Variance[/C][/ROW]
[ROW][C] [/C][C]Df[/C][C]F value[/C][C]Pr(>F)[/C][/ROW]
[ROW][C]Group[/C][C]1[/C][C]0.151[/C][C]0.7[/C][/ROW]
[ROW][C] [/C][C]35[/C][C] [/C][C] [/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=139940&T=4

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=139940&T=4

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


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

Levenes Test for Homogeneity of Variance
DfF valuePr(>F)
Group10.1510.7
35


Figures (Output of Computation)

Input Parameters & R Code

Parameters (Session):
par1 = 1 ; par2 = 2 ; par3 = 0.95 ; par4 = two.sided ; par5 = paired ; par6 = 0 ;
Parameters (R input):
par1 = 1 ; par2 = 2 ; par3 = TRUE ;
R code (references can be found in the software module):
cat1 <- as.numeric(par1) #
cat2<- as.numeric(par2) #
intercept<-as.logical(par3)
x <- t(x)
x1<-as.numeric(x[,cat1])
f1<-as.character(x[,cat2])
xdf<-data.frame(x1,f1)
(V1<-dimnames(y)[[1]][cat1])
(V2<-dimnames(y)[[1]][cat2])
names(xdf)<-c('Response', 'Treatment')
if(intercept == FALSE) (lmxdf<-lm(Response ~ Treatment - 1, data = xdf) ) else (lmxdf<-lm(Response ~ Treatment, data = xdf) )
(aov.xdf<-aov(lmxdf) )
(anova.xdf<-anova(lmxdf) )
load(file='createtable')
a<-table.start()
a<-table.row.start(a)
a<-table.element(a,'ANOVA Model', length(lmxdf$coefficients)+1,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a, paste(V1, ' ~ ', V2), length(lmxdf$coefficients)+1,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a, 'means',,TRUE)
for(i in 1:length(lmxdf$coefficients)){
a<-table.element(a, round(lmxdf$coefficients[i], digits=3),,FALSE)
}
a<-table.row.end(a)
a<-table.end(a)
table.save(a,file='mytable.tab')
a<-table.start()
a<-table.row.start(a)
a<-table.element(a,'ANOVA Statistics', 5+1,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a, ' ',,TRUE)
a<-table.element(a, 'Df',,FALSE)
a<-table.element(a, 'Sum Sq',,FALSE)
a<-table.element(a, 'Mean Sq',,FALSE)
a<-table.element(a, 'F value',,FALSE)
a<-table.element(a, 'Pr(>F)',,FALSE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a, V2,,TRUE)
a<-table.element(a, anova.xdf$Df[1],,FALSE)
a<-table.element(a, round(anova.xdf$'Sum Sq'[1], digits=3),,FALSE)
a<-table.element(a, round(anova.xdf$'Mean Sq'[1], digits=3),,FALSE)
a<-table.element(a, round(anova.xdf$'F value'[1], digits=3),,FALSE)
a<-table.element(a, round(anova.xdf$'Pr(>F)'[1], digits=3),,FALSE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a, 'Residuals',,TRUE)
a<-table.element(a, anova.xdf$Df[2],,FALSE)
a<-table.element(a, round(anova.xdf$'Sum Sq'[2], digits=3),,FALSE)
a<-table.element(a, round(anova.xdf$'Mean Sq'[2], digits=3),,FALSE)
a<-table.element(a, ' ',,FALSE)
a<-table.element(a, ' ',,FALSE)
a<-table.row.end(a)
a<-table.end(a)
table.save(a,file='mytable1.tab')
bitmap(file='anovaplot.png')
boxplot(Response ~ Treatment, data=xdf, xlab=V2, ylab=V1)
dev.off()
if(intercept==TRUE){
thsd<-TukeyHSD(aov.xdf)
bitmap(file='TukeyHSDPlot.png')
plot(thsd)
dev.off()
}
if(intercept==TRUE){
a<-table.start()
a<-table.row.start(a)
a<-table.element(a,'Tukey Honest Significant Difference Comparisons', 5,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a, ' ', 1, TRUE)
for(i in 1:4){
a<-table.element(a,colnames(thsd[[1]])[i], 1, TRUE)
}
a<-table.row.end(a)
for(i in 1:length(rownames(thsd[[1]]))){
a<-table.row.start(a)
a<-table.element(a,rownames(thsd[[1]])[i], 1, TRUE)
for(j in 1:4){
a<-table.element(a,round(thsd[[1]][i,j], digits=3), 1, FALSE)
}
a<-table.row.end(a)
}
a<-table.end(a)
table.save(a,file='mytable2.tab')
}
if(intercept==FALSE){
a<-table.start()
a<-table.row.start(a)
a<-table.element(a,'TukeyHSD Message', 1,TRUE)
a<-table.row.end(a)
a<-table.start()
a<-table.row.start(a)
a<-table.element(a,'Must Include Intercept to use Tukey Test ', 1, FALSE)
a<-table.row.end(a)
a<-table.end(a)
table.save(a,file='mytable2.tab')
}
library(car)
lt.lmxdf<-levene.test(lmxdf)
a<-table.start()
a<-table.row.start(a)
a<-table.element(a,'Levenes Test for Homogeneity of Variance', 4,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,' ', 1, TRUE)
for (i in 1:3){
a<-table.element(a,names(lt.lmxdf)[i], 1, FALSE)
}
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Group', 1, TRUE)
for (i in 1:3){
a<-table.element(a,round(lt.lmxdf[[i]][1], digits=3), 1, FALSE)
}
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,' ', 1, TRUE)
a<-table.element(a,lt.lmxdf[[1]][2], 1, FALSE)
a<-table.element(a,' ', 1, FALSE)
a<-table.element(a,' ', 1, FALSE)
a<-table.row.end(a)
a<-table.end(a)
table.save(a,file='mytable3.tab')