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Description of Statistical Computation

Author's title

Author*The author of this computation has been verified*
R Software Modulerwasp_Tests to Compare Two Means.wasp
Title produced by softwareT-Tests
Date of computationFri, 01 Jun 2012 05:49:05 -0400
Cite this page as followsStatistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?v=date/2012/Jun/01/t1338544173rsssl11nrp2z1p1.htm/, Retrieved Thu, 02 May 2024 04:46:01 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=168427, Retrieved Thu, 02 May 2024 04:46:01 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact84

Tree of Dependent Computations

Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)
-       [T-Tests] [] [2012-06-01 09:49:05] [898f528db62d66cb4fd17f9b6ea3eb9d] [Current]
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Dataset

Dataseries X:
Download CSV
Histogram
Boxplots 
7	2
-1	3
0	2
-1	3
0	3
-5	3
-1	1
0	3
0	4
0	0
-5	3
0	1
2	1
-2	6
-2	4
0	1
0	3
5	-1
2	1
1	4
4	4
-1	2
-2	1
0	4
-1	2
3	4
1	2
1	2
2	3
1	3
1	4
1	2
-1	4
0	5
-5	10
-1	2
1	2
1	-6
5	4
0	0
0	0
-2	3
1	2
0	0
-1	5
0	4
0	6
0	1
0	3
0	3
-1	2
2	4
1	2
2	3
0	1
4	3
-2	3
-1	2
0	5
0	3
0	2
0	4
0	2
0	2
1	3
3	2
3	0
0	2
2	4
-1	3
-2	2
-1	0
-2	0
0	5
0	0
4	-1
3	3
-1	3
0	2
2	-2
4	3
1	2
1	3
0	1
1	4
1	1
0	4
1	2
0	1
3	3
4	5
0	2
5	4
4	3
1	3
0	-1
0	-2
1	3
0	2
-2	2
0	5
-1	2
-4	6
0	3
1	1
-5	1
-9	2
1	-3
-5	2
-1	2
-4	3
1	3
2	3
3	0
-1	1
0	3
2	3
-2	-1
0	0
-2	3
3	4
-3	-1
1	-1
-5	0
1	4
-1	3
5	3
-1	3
-1	0
0	7
-5	5
-1	4
4	3
0	-2
-1	2
-1	0
-1	-2
-2	-1
-4	3
2	3
-2	1
-2	0
1	4
2	3
0	3
-6	0
0	8
0	0
0	3
2	1
-1	4
-1	0
1	3
-4	2
-2	0
-1	2
-1	3
2	3
-2	0
2	1
-4	4
1	-2
-2	2
1	3
1	4
0	0
-2	0
3	0
-1	5
-1	3
0	1
2	1
0	0
1	3
-5	-3
3	0
3	0
3	0
-1	3
-2	-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'Herman Ole Andreas Wold' @ wold.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 & 'Herman Ole Andreas Wold' @ wold.wessa.net \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=168427&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]'Herman Ole Andreas Wold' @ wold.wessa.net[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=168427&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=168427&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'Herman Ole Andreas Wold' @ wold.wessa.net






T-Test
Mean10.01667
Mean22.09444
T Statistic-8.96593
P-value0
Lower Confidence Limit-2.53354
Upper Confidence Limit-1.62201

\begin{tabular}{lllllllll}
\hline
T-Test \tabularnewline
Mean1 & 0.01667 \tabularnewline
Mean2 & 2.09444 \tabularnewline
T Statistic & -8.96593 \tabularnewline
P-value & 0 \tabularnewline
Lower Confidence Limit & -2.53354 \tabularnewline
Upper Confidence Limit & -1.62201 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=168427&T=1

[TABLE]
[ROW][C]T-Test[/C][/ROW]
[ROW][C]Mean1[/C][C]0.01667[/C][/ROW]
[ROW][C]Mean2[/C][C]2.09444[/C][/ROW]
[ROW][C]T Statistic[/C][C]-8.96593[/C][/ROW]
[ROW][C]P-value[/C][C]0[/C][/ROW]
[ROW][C]Lower Confidence Limit[/C][C]-2.53354[/C][/ROW]
[ROW][C]Upper Confidence Limit[/C][C]-1.62201[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=168427&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=168427&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:

T-Test
Mean10.01667
Mean22.09444
T Statistic-8.96593
P-value0
Lower Confidence Limit-2.53354
Upper Confidence Limit-1.62201






Standard Deviations
Variable 12.31216
Variable 22.07861

\begin{tabular}{lllllllll}
\hline
Standard Deviations \tabularnewline
Variable 1 & 2.31216 \tabularnewline
Variable 2 & 2.07861 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=168427&T=2

[TABLE]
[ROW][C]Standard Deviations[/C][/ROW]
[ROW][C]Variable 1[/C][C]2.31216[/C][/ROW]
[ROW][C]Variable 2[/C][C]2.07861[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=168427&T=2

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=168427&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:

Standard Deviations
Variable 12.31216
Variable 22.07861


Figures (Output of Computation)

Input Parameters & R Code

Parameters (Session):
par1 = two.sided ; par2 = 1 ; par3 = 2 ; par4 = T-Test ; par5 = unpaired ; par6 = 0.0 ; par7 = 0.95 ; par8 = TRUE ;
Parameters (R input):
par1 = two.sided ; par2 = 1 ; par3 = 2 ; par4 = T-Test ; par5 = unpaired ; par6 = 0.0 ; par7 = 0.95 ; par8 = TRUE ;
R code (references can be found in the software module):
par8 <- 'TRUE'
par7 <- '0.95'
par6 <- '0.0'
par5 <- 'unpaired'
par4 <- 'T-Test'
par3 <- '2'
par2 <- '1'
par1 <- 'two.sided'
par2 <- as.numeric(par2)
par3 <- as.numeric(par3)
par4 <- as.character(par4)
par5 <- as.character(par5)
par6 <- as.numeric(par6)
par7 <- as.numeric(par7)
par8 <- as.logical(par8)
if ( par5 == 'unpaired') paired <- FALSE else paired <- TRUE
x <- t(y)
if(par8){
bitmap(file='test1.png')
(r<-boxplot(x ,xlab=xlab,ylab=ylab,main=main,notch=FALSE,col=2))
dev.off()
}
load(file='createtable')
if( par4 == 'Wilcoxon-Mann_Whitney'){
a<-table.start()
a <- table.row.start(a)
a <- table.element(a,'Wilcoxon Test',3,TRUE)
a <- table.row.end(a)
a <- table.row.start(a)
a <- table.element(a,'',1,TRUE)
a <- table.element(a,'Statistic',1,TRUE)
a <- table.element(a,'P-value',1,TRUE)
a <- table.row.end(a)
W <- wilcox.test(x[,par2],x[,par3],alternative=par1, paired = paired)
a<-table.row.start(a)
a<-table.element(a,'Wilcoxon Test',1,TRUE)
a<-table.element(a,W$statistic[[1]])
a<-table.element(a,round(W$p.value, digits=5) )
a<-table.row.end(a)
a<-table.end(a)
table.save(a,file='mytable.tab')
}
if( par4 == 'T-Test')
{
T <- t.test(x[,par2],x[,par3],alternative=par1, paired=paired, mu=par6, conf.level=par7)
a<-table.start()
a <- table.row.start(a)
a <- table.element(a,'T-Test',3,TRUE)
a <- table.row.end(a)
if(paired){
a <- table.row.start(a)
a <- table.element(a,'Difference: Mean1 - Mean2',1,TRUE)
a<-table.element(a,round(T$estimate, digits=5) )
a <- table.row.end(a)
}
if(!paired){
a <- table.row.start(a)
a <- table.element(a,'Mean1',1,TRUE)
a<-table.element(a,round(T$estimate[1], digits=5) )
a <- table.row.end(a)
a <- table.row.start(a)
a <- table.element(a,'Mean2',1,TRUE)
a<-table.element(a,round(T$estimate[2], digits=5) )
a <- table.row.end(a)
}
a <- table.row.start(a)
a <- table.element(a,'T Statistic',1,TRUE)
a<-table.element(a,round(T$statistic, digits=5) )
a <- table.row.end(a)
a <- table.row.start(a)
a <- table.element(a,'P-value',1,TRUE)
a<-table.element(a,round(T$p.value, digits=5) )
a <- table.row.end(a)
a <- table.row.start(a)
a <- table.element(a,'Lower Confidence Limit',1,TRUE)
a<-table.element(a,round(T$conf.int[1], digits=5) )
a <- table.row.end(a)
a<-table.row.start(a)
a <- table.element(a,'Upper Confidence Limit',1,TRUE)
a<-table.element(a,round(T$conf.int[2], digits=5) )
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,'Standard Deviations',3,TRUE)
a <- table.row.end(a)
a <- table.row.start(a)
a <- table.element(a,'Variable 1',1,TRUE)
a<-table.element(a,round(sd(x[,par2], na.rm=TRUE), digits=5) )
a <- table.row.end(a)
a <- table.row.start(a)
a <- table.element(a,'Variable 2',1,TRUE)
a<-table.element(a,round(sd(x[,par3], na.rm=TRUE), digits=5) )
a <- table.row.end(a)
a<-table.end(a)
table.save(a,file='mytable1.tab')