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Description of Statistical Computation

Author's title

Author*The author of this computation has been verified*
R Software Modulerwasp_twosampletests_mean.wasp
Title produced by softwarePaired and Unpaired Two Samples Tests about the Mean
Date of computationSat, 06 Dec 2014 21:35:58 +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/2014/Dec/06/t14179017758u9d7vxtw4vwo43.htm/, Retrieved Thu, 16 May 2024 11:26:35 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=263675, Retrieved Thu, 16 May 2024 11:26:35 +0000
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Estimated Impact78

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-       [Paired and Unpaired Two Samples Tests about the Mean] [Paper] [2014-12-06 21:35:58] [984e7ebcf70ed344d92ecabf69fab39c] [Current]
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Dataset

Dataseries X:
Download CSV
Histogram
Boxplots 
12,9	11,3
7,4	9,6
12,2	16,1
12,8	13,4
7,4	12,7
6,7	12,3
12,6	7,9
14,8	12,3
13,3	11,6
11,1	6,7
8,2	12,1
11,4	5,7
6,4	8,0
10,6	13,3
12,0	9,1
6,3	12,2
11,9	8,8
9,3	14,6
10,0	12,6
6,4	9,9
13,8	10,5
10,8	13,4
13,8	10,9
11,7	4,3
10,9	10,3
9,9	11,8
11,5	11,2
8,3	11,4
11,7	8,6
6,1	13,2
9,0	12,6
9,7	5,6
10,8	9,9
10,3	8,8
10,4	7,7
9,3	9,0
11,8	7,3
5,9	11,4
11,4	13,6
13,0	7,9
10,8	10,7
11,3	10,3
11,8	8,3
12,7	9,6
10,9	14,2
13,3	8,5
10,1	13,5
14,3	4,9
9,3	6,4
12,5	9,6
7,6	11,6
15,9	11,1
9,2	16,6
11,1	12,6
13,0	18,9
14,5	11,6
12,3	14,6
11,4	13,85
7,3	14,85
12,6	11,75
NA	18,45
13,0	15,9
13,2	19,9
7,7	10,95
4,35	18,45
12,7	15,1
18,1	15
17,85	11,35
17,1	15,95
19,1	18,1
16,1	14,6
13,35	17,6
18,4	15,35
14,7	13,4
10,6	13,9
12,6	15,25
16,2	12,9
13,6	16,1
14,1	17,35
14,5	13,15
16,15	12,15
14,75	12,6
14,8	10,35
12,45	15,4
12,65	9,6
17,35	18,2
8,6	13,6
18,4	14,85
16,1	14,1
17,75	14,9
15,25	16,25
17,65	13,6
15,6	15,65
16,35	14,6
17,65	12,65
13,6	11,9
11,7	19,2
14,35	16,6
14,75	11,2
18,25	13,2
9,9	15,85
16	11,15
18,25	15,65
16,85	7,65
18,95	15,2
15,6	15,6
17,1	13,1
16,1	11,85
15,4	12,4
15,4	11,4
13,35	14,9
19,1	19,9
7,6	11,2
19,1	14,6
14,75	14,75
19,25	15,15
13,6	16,85
12,75	7,85
9,85	12,6
15,25	7,85
11,9	10,95
16,35	12,35
12,4	9,95
14,35	14,9
18,15	16,65
17,75	13,4
12,35	13,95
15,6	15,7
19,3	16,85
17,1	10,95
18,4	15,35
19,05	12,2
18,55	15,1
19,1	17,75
12,85	15,2
9,5	16,65
4,5	8,1
13,6	
11,7	
13,35	
17,75	
17,6	
14,05	
16,1	
13,35	
11,85	
11,95	
13,2	
7,7	
14,6

Tables (Output of Computation)





Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time2 seconds
R Server'George Udny Yule' @ yule.wessa.net
R Framework error message
The field 'Names of X columns' contains a hard return which cannot be interpreted.
Please, resubmit your request without hard returns in the 'Names of X columns'.

\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
R Framework error message & 
The field 'Names of X columns' contains a hard return which cannot be interpreted.
Please, resubmit your request without hard returns in the 'Names of X columns'.
 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=263675&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]
[ROW][C]R Framework error message[/C][C]
The field 'Names of X columns' contains a hard return which cannot be interpreted.
Please, resubmit your request without hard returns in the 'Names of X columns'.
[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=263675&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=263675&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 time2 seconds
R Server'George Udny Yule' @ yule.wessa.net
R Framework error message
The field 'Names of X columns' contains a hard return which cannot be interpreted.
Please, resubmit your request without hard returns in the 'Names of X columns'.






Two Sample t-test (unpaired)
Mean of Sample 113.1151006711409
Mean of Sample 212.616
t-stat1.26770364287156
df297
p-value0.205896767052072
H0 value0
Alternativetwo.sided
CI Level0.95
CI[-0.27570336435484,1.27390470663672]
F-test to compare two variances
F-stat1.14432825294612
df148
p-value0.412216745297989
H0 value1
Alternativetwo.sided
CI Level0.95
CI[0.828609264526377,1.58062431561469]

\begin{tabular}{lllllllll}
\hline
Two Sample t-test (unpaired) \tabularnewline
Mean of Sample 1 & 13.1151006711409 \tabularnewline
Mean of Sample 2 & 12.616 \tabularnewline
t-stat & 1.26770364287156 \tabularnewline
df & 297 \tabularnewline
p-value & 0.205896767052072 \tabularnewline
H0 value & 0 \tabularnewline
Alternative & two.sided \tabularnewline
CI Level & 0.95 \tabularnewline
CI & [-0.27570336435484,1.27390470663672] \tabularnewline
F-test to compare two variances \tabularnewline
F-stat & 1.14432825294612 \tabularnewline
df & 148 \tabularnewline
p-value & 0.412216745297989 \tabularnewline
H0 value & 1 \tabularnewline
Alternative & two.sided \tabularnewline
CI Level & 0.95 \tabularnewline
CI & [0.828609264526377,1.58062431561469] \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=263675&T=1

[TABLE]
[ROW][C]Two Sample t-test (unpaired)[/C][/ROW]
[ROW][C]Mean of Sample 1[/C][C]13.1151006711409[/C][/ROW]
[ROW][C]Mean of Sample 2[/C][C]12.616[/C][/ROW]
[ROW][C]t-stat[/C][C]1.26770364287156[/C][/ROW]
[ROW][C]df[/C][C]297[/C][/ROW]
[ROW][C]p-value[/C][C]0.205896767052072[/C][/ROW]
[ROW][C]H0 value[/C][C]0[/C][/ROW]
[ROW][C]Alternative[/C][C]two.sided[/C][/ROW]
[ROW][C]CI Level[/C][C]0.95[/C][/ROW]
[ROW][C]CI[/C][C][-0.27570336435484,1.27390470663672][/C][/ROW]
[ROW][C]F-test to compare two variances[/C][/ROW]
[ROW][C]F-stat[/C][C]1.14432825294612[/C][/ROW]
[ROW][C]df[/C][C]148[/C][/ROW]
[ROW][C]p-value[/C][C]0.412216745297989[/C][/ROW]
[ROW][C]H0 value[/C][C]1[/C][/ROW]
[ROW][C]Alternative[/C][C]two.sided[/C][/ROW]
[ROW][C]CI Level[/C][C]0.95[/C][/ROW]
[ROW][C]CI[/C][C][0.828609264526377,1.58062431561469][/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=263675&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=263675&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:

Two Sample t-test (unpaired)
Mean of Sample 113.1151006711409
Mean of Sample 212.616
t-stat1.26770364287156
df297
p-value0.205896767052072
H0 value0
Alternativetwo.sided
CI Level0.95
CI[-0.27570336435484,1.27390470663672]
F-test to compare two variances
F-stat1.14432825294612
df148
p-value0.412216745297989
H0 value1
Alternativetwo.sided
CI Level0.95
CI[0.828609264526377,1.58062431561469]






Welch Two Sample t-test (unpaired)
Mean of Sample 113.1151006711409
Mean of Sample 212.616
t-stat1.26741734524799
df295.382355890902
p-value0.206004356354616
H0 value0
Alternativetwo.sided
CI Level0.95
CI[-0.275895749923607,1.27409709220549]

\begin{tabular}{lllllllll}
\hline
Welch Two Sample t-test (unpaired) \tabularnewline
Mean of Sample 1 & 13.1151006711409 \tabularnewline
Mean of Sample 2 & 12.616 \tabularnewline
t-stat & 1.26741734524799 \tabularnewline
df & 295.382355890902 \tabularnewline
p-value & 0.206004356354616 \tabularnewline
H0 value & 0 \tabularnewline
Alternative & two.sided \tabularnewline
CI Level & 0.95 \tabularnewline
CI & [-0.275895749923607,1.27409709220549] \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=263675&T=2

[TABLE]
[ROW][C]Welch Two Sample t-test (unpaired)[/C][/ROW]
[ROW][C]Mean of Sample 1[/C][C]13.1151006711409[/C][/ROW]
[ROW][C]Mean of Sample 2[/C][C]12.616[/C][/ROW]
[ROW][C]t-stat[/C][C]1.26741734524799[/C][/ROW]
[ROW][C]df[/C][C]295.382355890902[/C][/ROW]
[ROW][C]p-value[/C][C]0.206004356354616[/C][/ROW]
[ROW][C]H0 value[/C][C]0[/C][/ROW]
[ROW][C]Alternative[/C][C]two.sided[/C][/ROW]
[ROW][C]CI Level[/C][C]0.95[/C][/ROW]
[ROW][C]CI[/C][C][-0.275895749923607,1.27409709220549][/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=263675&T=2

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=263675&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:

Welch Two Sample t-test (unpaired)
Mean of Sample 113.1151006711409
Mean of Sample 212.616
t-stat1.26741734524799
df295.382355890902
p-value0.206004356354616
H0 value0
Alternativetwo.sided
CI Level0.95
CI[-0.275895749923607,1.27409709220549]






Wicoxon rank sum test with continuity correction (unpaired)
W12060
p-value0.236665537369559
H0 value0
Alternativetwo.sided
Kolmogorov-Smirnov Test to compare Distributions of two Samples
KS Statistic0.108322147651007
p-value0.344317940865429
Kolmogorov-Smirnov Test to compare Distributional Shape of two Samples
KS Statistic0.0743624161073826
p-value0.802890653408304

\begin{tabular}{lllllllll}
\hline
Wicoxon rank sum test with continuity correction (unpaired) \tabularnewline
W & 12060 \tabularnewline
p-value & 0.236665537369559 \tabularnewline
H0 value & 0 \tabularnewline
Alternative & two.sided \tabularnewline
Kolmogorov-Smirnov Test to compare Distributions of two Samples \tabularnewline
KS Statistic & 0.108322147651007 \tabularnewline
p-value & 0.344317940865429 \tabularnewline
Kolmogorov-Smirnov Test to compare Distributional Shape of two Samples \tabularnewline
KS Statistic & 0.0743624161073826 \tabularnewline
p-value & 0.802890653408304 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=263675&T=3

[TABLE]
[ROW][C]Wicoxon rank sum test with continuity correction (unpaired)[/C][/ROW]
[ROW][C]W[/C][C]12060[/C][/ROW]
[ROW][C]p-value[/C][C]0.236665537369559[/C][/ROW]
[ROW][C]H0 value[/C][C]0[/C][/ROW]
[ROW][C]Alternative[/C][C]two.sided[/C][/ROW]
[ROW][C]Kolmogorov-Smirnov Test to compare Distributions of two Samples[/C][/ROW]
[ROW][C]KS Statistic[/C][C]0.108322147651007[/C][/ROW]
[ROW][C]p-value[/C][C]0.344317940865429[/C][/ROW]
[ROW][C]Kolmogorov-Smirnov Test to compare Distributional Shape of two Samples[/C][/ROW]
[ROW][C]KS Statistic[/C][C]0.0743624161073826[/C][/ROW]
[ROW][C]p-value[/C][C]0.802890653408304[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=263675&T=3

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=263675&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:

Wicoxon rank sum test with continuity correction (unpaired)
W12060
p-value0.236665537369559
H0 value0
Alternativetwo.sided
Kolmogorov-Smirnov Test to compare Distributions of two Samples
KS Statistic0.108322147651007
p-value0.344317940865429
Kolmogorov-Smirnov Test to compare Distributional Shape of two Samples
KS Statistic0.0743624161073826
p-value0.802890653408304


Figures (Output of Computation)

Input Parameters & R Code

Parameters (Session):
par1 = 1 ; par2 = 2 ; par3 = 0.95 ; par4 = two.sided ; par5 = unpaired ; par6 = 0 ;
Parameters (R input):
par1 = 1 ; par2 = 2 ; par3 = 0.95 ; par4 = two.sided ; par5 = unpaired ; par6 = 0 ;
R code (references can be found in the software module):
par1 <- as.numeric(par1) #column number of first sample
par2 <- as.numeric(par2) #column number of second sample
par3 <- as.numeric(par3) #confidence (= 1 - alpha)
if (par5 == 'unpaired') paired <- FALSE else paired <- TRUE
par6 <- as.numeric(par6) #H0
z <- t(y)
if (par1 == par2) stop('Please, select two different column numbers')
if (par1 < 1) stop('Please, select a column number greater than zero for the first sample')
if (par2 < 1) stop('Please, select a column number greater than zero for the second sample')
if (par1 > length(z[1,])) stop('The column number for the first sample should be smaller')
if (par2 > length(z[1,])) stop('The column number for the second sample should be smaller')
if (par3 <= 0) stop('The confidence level should be larger than zero')
if (par3 >= 1) stop('The confidence level should be smaller than zero')
(r.t <- t.test(z[,par1],z[,par2],var.equal=TRUE,alternative=par4,paired=paired,mu=par6,conf.level=par3))
(v.t <- var.test(z[,par1],z[,par2],conf.level=par3))
(r.w <- t.test(z[,par1],z[,par2],var.equal=FALSE,alternative=par4,paired=paired,mu=par6,conf.level=par3))
(w.t <- wilcox.test(z[,par1],z[,par2],alternative=par4,paired=paired,mu=par6,conf.level=par3))
(ks.t <- ks.test(z[,par1],z[,par2],alternative=par4))
m1 <- mean(z[,par1],na.rm=T)
m2 <- mean(z[,par2],na.rm=T)
mdiff <- m1 - m2
newsam1 <- z[!is.na(z[,par1]),par1]
newsam2 <- z[,par2]+mdiff
newsam2 <- newsam2[!is.na(newsam2)]
(ks1.t <- ks.test(newsam1,newsam2,alternative=par4))
mydf <- data.frame(cbind(z[,par1],z[,par2]))
colnames(mydf) <- c('Variable 1','Variable 2')
bitmap(file='test1.png')
boxplot(mydf, notch=TRUE, ylab='value',main=main)
dev.off()
bitmap(file='test2.png')
qqnorm(z[,par1],main='Normal QQplot - Variable 1')
qqline(z[,par1])
dev.off()
bitmap(file='test3.png')
qqnorm(z[,par2],main='Normal QQplot - Variable 2')
qqline(z[,par2])
dev.off()
load(file='createtable')
a<-table.start()
a<-table.row.start(a)
a<-table.element(a,paste('Two Sample t-test (',par5,')',sep=''),2,TRUE)
a<-table.row.end(a)
if(!paired){
a<-table.row.start(a)
a<-table.element(a,'Mean of Sample 1',header=TRUE)
a<-table.element(a,r.t$estimate[[1]])
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Mean of Sample 2',header=TRUE)
a<-table.element(a,r.t$estimate[[2]])
a<-table.row.end(a)
} else {
a<-table.row.start(a)
a<-table.element(a,'Difference: Mean1 - Mean2',header=TRUE)
a<-table.element(a,r.t$estimate)
a<-table.row.end(a)
}
a<-table.row.start(a)
a<-table.element(a,'t-stat',header=TRUE)
a<-table.element(a,r.t$statistic[[1]])
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'df',header=TRUE)
a<-table.element(a,r.t$parameter[[1]])
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'p-value',header=TRUE)
a<-table.element(a,r.t$p.value)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'H0 value',header=TRUE)
a<-table.element(a,r.t$null.value[[1]])
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Alternative',header=TRUE)
a<-table.element(a,r.t$alternative)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'CI Level',header=TRUE)
a<-table.element(a,attr(r.t$conf.int,'conf.level'))
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'CI',header=TRUE)
a<-table.element(a,paste('[',r.t$conf.int[1],',',r.t$conf.int[2],']',sep=''))
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'F-test to compare two variances',2,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'F-stat',header=TRUE)
a<-table.element(a,v.t$statistic[[1]])
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'df',header=TRUE)
a<-table.element(a,v.t$parameter[[1]])
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'p-value',header=TRUE)
a<-table.element(a,v.t$p.value)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'H0 value',header=TRUE)
a<-table.element(a,v.t$null.value[[1]])
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Alternative',header=TRUE)
a<-table.element(a,v.t$alternative)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'CI Level',header=TRUE)
a<-table.element(a,attr(v.t$conf.int,'conf.level'))
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'CI',header=TRUE)
a<-table.element(a,paste('[',v.t$conf.int[1],',',v.t$conf.int[2],']',sep=''))
a<-table.row.end(a)
a<-table.end(a)
table.save(a,file='mytable.tab')
a<-table.start()
a<-table.row.start(a)
a<-table.element(a,paste('Welch Two Sample t-test (',par5,')',sep=''),2,TRUE)
a<-table.row.end(a)
if(!paired){
a<-table.row.start(a)
a<-table.element(a,'Mean of Sample 1',header=TRUE)
a<-table.element(a,r.w$estimate[[1]])
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Mean of Sample 2',header=TRUE)
a<-table.element(a,r.w$estimate[[2]])
a<-table.row.end(a)
} else {
a<-table.row.start(a)
a<-table.element(a,'Difference: Mean1 - Mean2',header=TRUE)
a<-table.element(a,r.w$estimate)
a<-table.row.end(a)
}
a<-table.row.start(a)
a<-table.element(a,'t-stat',header=TRUE)
a<-table.element(a,r.w$statistic[[1]])
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'df',header=TRUE)
a<-table.element(a,r.w$parameter[[1]])
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'p-value',header=TRUE)
a<-table.element(a,r.w$p.value)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'H0 value',header=TRUE)
a<-table.element(a,r.w$null.value[[1]])
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Alternative',header=TRUE)
a<-table.element(a,r.w$alternative)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'CI Level',header=TRUE)
a<-table.element(a,attr(r.w$conf.int,'conf.level'))
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'CI',header=TRUE)
a<-table.element(a,paste('[',r.w$conf.int[1],',',r.w$conf.int[2],']',sep=''))
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,paste('Wicoxon rank sum test with continuity correction (',par5,')',sep=''),2,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'W',header=TRUE)
a<-table.element(a,w.t$statistic[[1]])
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'p-value',header=TRUE)
a<-table.element(a,w.t$p.value)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'H0 value',header=TRUE)
a<-table.element(a,w.t$null.value[[1]])
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Alternative',header=TRUE)
a<-table.element(a,w.t$alternative)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Kolmogorov-Smirnov Test to compare Distributions of two Samples',2,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'KS Statistic',header=TRUE)
a<-table.element(a,ks.t$statistic[[1]])
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'p-value',header=TRUE)
a<-table.element(a,ks.t$p.value)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Kolmogorov-Smirnov Test to compare Distributional Shape of two Samples',2,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'KS Statistic',header=TRUE)
a<-table.element(a,ks1.t$statistic[[1]])
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'p-value',header=TRUE)
a<-table.element(a,ks1.t$p.value)
a<-table.row.end(a)
a<-table.end(a)
table.save(a,file='mytable2.tab')