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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 computationWed, 08 Dec 2010 19:25:10 +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/Dec/08/t1291836238zyqaz8ov1egaoeb.htm/, Retrieved Fri, 03 May 2024 08:30:31 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=107097, Retrieved Fri, 03 May 2024 08:30:31 +0000
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Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact125
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] [Dagelijkse omzet ...] [2010-10-25 11:22:12] [b98453cac15ba1066b407e146608df68]
-   PD  [Paired and Unpaired Two Samples Tests about the Mean] [] [2010-10-29 18:44:51] [1251ac2db27b84d4a3ba43449388906b]
-    D    [Paired and Unpaired Two Samples Tests about the Mean] [] [2010-12-08 18:37:19] [1251ac2db27b84d4a3ba43449388906b]
-    D        [Paired and Unpaired Two Samples Tests about the Mean] [] [2010-12-08 19:25:10] [1638ccfec791c539017705f3e680eb33] [Current]
-   PD          [Paired and Unpaired Two Samples Tests about the Mean] [Two Sample T-Test...] [2010-12-09 18:03:24] [1251ac2db27b84d4a3ba43449388906b]
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Dataseries X:
2	5	5	8
1	3	1	3
0	0	4	6
3	7	4	9
3	4	5	8
1	1	2	5
3	6	3	7
1	3	3	7
4	12	3	6
0	0	0	0
3	5	3	8
2	6	3	5
4	6	1	3
3	6	1	3
1	2	2	4
1	1	3	5
2	5	4	7
3	7	2	4
1	3	3	5
1	3	0	0
2	3	1	3
3	7	2	6
4	8	0	0
2	6	1	2
1	3	2	4
2	5	1	3
2	5	2	5
4	10	3	9
2	2	4	5
3	6	3	4
3	4	1	3
3	6	3	7
4	8	1	3
2	4	2	4
2	5	4	6
4	10	3	5
3	6	1	1
4	7	4	10
2	4	3	7
5	10	1	3
3	4	3	8
1	3	3	6
1	3	3	7
1	3	2	6
2	3	3	5
3	7	2	6
9	15	2	3
0	0	1	2
0	0	2	5
2	4	2	3
2	5	1	3
3	5	3	4
1	2	4	8
2	3	1	3
0	0	3	6
5	9	2	5
2	2	3	6
4	7	3	5
3	7	1	2
0	0	1	2
0	0	1	3
4	10	4	10
1	2	1	3
1	1	3	5
4	8	4	5
2	6	1	1
4	11	1	2
1	3	1	2
4	8	1	2
2	6	3	8
5	9	2	2
4	9	0	0
4	8	1	3
4	8	2	5
4	7	4	6
3	6	2	4
3	5	1	3
3	4	1	1
2	6	1	1
1	3	1	1
1	2	3	6
5	12	2	6
4	8	2	5
2	5	4	10
3	9	4	11
2	6	3	7
2	5	3	4
2	2	4	9
2	4	1	3
3	7	3	4
2	5	1	1
3	6	6	10
4	7	2	5
3	8	1	3
3	6	0	0
0	0	4	10
1	1	1	1
2	5	1	3
2	5	2	4
3	5	4	11
4	7	0	0
4	7	3	4
1	1	4	7
2	3	4	6
2	4	1	2
3	8	1	1
3	6	1	3
3	6	1	3
1	2	3	9
1	2	2	6
1	3	1	2
1	3	1	3
0	0	1	3
1	2	2	4
3	8	1	3
3	8	4	7
0	0	3	5
2	5	4	5
5	9	2	3
2	6	2	2
3	6	1	2
3	3	2	6
5	9	4	9
4	7	2	4
4	8	3	8
0	0	1	3
3	7	1	3
0	0	2	5
2	5	1	1
0	0	2	5
6	14	1	3
3	5	0	0
1	2	1	1
6	8	0	0
2	4	2	2
1	2	0	0
3	6	1	3
1	3	0	0
2	5	1	1
4	9	1	3
1	3	1	2
2	3	1	3
0	0	0	0
5	10	1	3
2	4	0	0
1	2	0	0
1	3	1	1
4	10	1	3
3	7	1	1
0	0	0	0
3	6	0	0
3	8	2	4
0	0	1	2
2	4	0	0
5	10	0	0
2	5	0	0




Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time4 seconds
R Server'Gwilym Jenkins' @ 72.249.127.135

\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 & 'Gwilym Jenkins' @ 72.249.127.135 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=107097&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]'Gwilym Jenkins' @ 72.249.127.135[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=107097&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=107097&T=0

As an alternative you can also use a 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'Gwilym Jenkins' @ 72.249.127.135







Two Sample t-test (paired)
Difference: Mean1 - Mean20.467948717948718
t-stat2.94416921260959
df155
p-value0.00373698868781058
H0 value0
Alternativetwo.sided
CI Level0.95
CI[0.153979034592678,0.781918401304758]
F-test to compare two variances
F-stat1.31505159530305
df155
p-value0.0892303241852443
H0 value1
Alternativetwo.sided
CI Level0.95
CI[0.958734305238792,1.8037955759582]

\begin{tabular}{lllllllll}
\hline
Two Sample t-test (paired) \tabularnewline
Difference: Mean1 - Mean2 & 0.467948717948718 \tabularnewline
t-stat & 2.94416921260959 \tabularnewline
df & 155 \tabularnewline
p-value & 0.00373698868781058 \tabularnewline
H0 value & 0 \tabularnewline
Alternative & two.sided \tabularnewline
CI Level & 0.95 \tabularnewline
CI & [0.153979034592678,0.781918401304758] \tabularnewline
F-test to compare two variances \tabularnewline
F-stat & 1.31505159530305 \tabularnewline
df & 155 \tabularnewline
p-value & 0.0892303241852443 \tabularnewline
H0 value & 1 \tabularnewline
Alternative & two.sided \tabularnewline
CI Level & 0.95 \tabularnewline
CI & [0.958734305238792,1.8037955759582] \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=107097&T=1

[TABLE]
[ROW][C]Two Sample t-test (paired)[/C][/ROW]
[ROW][C]Difference: Mean1 - Mean2[/C][C]0.467948717948718[/C][/ROW]
[ROW][C]t-stat[/C][C]2.94416921260959[/C][/ROW]
[ROW][C]df[/C][C]155[/C][/ROW]
[ROW][C]p-value[/C][C]0.00373698868781058[/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][0.153979034592678,0.781918401304758][/C][/ROW]
[ROW][C]F-test to compare two variances[/C][/ROW]
[ROW][C]F-stat[/C][C]1.31505159530305[/C][/ROW]
[ROW][C]df[/C][C]155[/C][/ROW]
[ROW][C]p-value[/C][C]0.0892303241852443[/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][0.958734305238792,1.8037955759582][/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=107097&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=107097&T=1

As an alternative you can also use a QR Code:  

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

Two Sample t-test (paired)
Difference: Mean1 - Mean20.467948717948718
t-stat2.94416921260959
df155
p-value0.00373698868781058
H0 value0
Alternativetwo.sided
CI Level0.95
CI[0.153979034592678,0.781918401304758]
F-test to compare two variances
F-stat1.31505159530305
df155
p-value0.0892303241852443
H0 value1
Alternativetwo.sided
CI Level0.95
CI[0.958734305238792,1.8037955759582]







Welch Two Sample t-test (paired)
Difference: Mean1 - Mean20.467948717948718
t-stat2.94416921260959
df155
p-value0.00373698868781058
H0 value0
Alternativetwo.sided
CI Level0.95
CI[0.153979034592678,0.781918401304758]

\begin{tabular}{lllllllll}
\hline
Welch Two Sample t-test (paired) \tabularnewline
Difference: Mean1 - Mean2 & 0.467948717948718 \tabularnewline
t-stat & 2.94416921260959 \tabularnewline
df & 155 \tabularnewline
p-value & 0.00373698868781058 \tabularnewline
H0 value & 0 \tabularnewline
Alternative & two.sided \tabularnewline
CI Level & 0.95 \tabularnewline
CI & [0.153979034592678,0.781918401304758] \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=107097&T=2

[TABLE]
[ROW][C]Welch Two Sample t-test (paired)[/C][/ROW]
[ROW][C]Difference: Mean1 - Mean2[/C][C]0.467948717948718[/C][/ROW]
[ROW][C]t-stat[/C][C]2.94416921260959[/C][/ROW]
[ROW][C]df[/C][C]155[/C][/ROW]
[ROW][C]p-value[/C][C]0.00373698868781058[/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][0.153979034592678,0.781918401304758][/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=107097&T=2

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=107097&T=2

As an alternative you can also use a QR Code:  

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

Welch Two Sample t-test (paired)
Difference: Mean1 - Mean20.467948717948718
t-stat2.94416921260959
df155
p-value0.00373698868781058
H0 value0
Alternativetwo.sided
CI Level0.95
CI[0.153979034592678,0.781918401304758]







Wicoxon rank sum test with continuity correction (paired)
W5072.5
p-value0.00810904447268412
H0 value0
Alternativetwo.sided
Kolmogorov-Smirnov Test to compare Distributions of two Samples
KS Statistic0.173076923076923
p-value0.0186869369470691
Kolmogorov-Smirnov Test to compare Distributional Shape of two Samples
KS Statistic0.179487179487179
p-value0.0131347468582815

\begin{tabular}{lllllllll}
\hline
Wicoxon rank sum test with continuity correction (paired) \tabularnewline
W & 5072.5 \tabularnewline
p-value & 0.00810904447268412 \tabularnewline
H0 value & 0 \tabularnewline
Alternative & two.sided \tabularnewline
Kolmogorov-Smirnov Test to compare Distributions of two Samples \tabularnewline
KS Statistic & 0.173076923076923 \tabularnewline
p-value & 0.0186869369470691 \tabularnewline
Kolmogorov-Smirnov Test to compare Distributional Shape of two Samples \tabularnewline
KS Statistic & 0.179487179487179 \tabularnewline
p-value & 0.0131347468582815 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=107097&T=3

[TABLE]
[ROW][C]Wicoxon rank sum test with continuity correction (paired)[/C][/ROW]
[ROW][C]W[/C][C]5072.5[/C][/ROW]
[ROW][C]p-value[/C][C]0.00810904447268412[/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]0.173076923076923[/C][/ROW]
[ROW][C]p-value[/C][C]0.0186869369470691[/C][/ROW]
[ROW][C]Kolmogorov-Smirnov Test to compare Distributional Shape of two Samples[/C][/ROW]
[ROW][C]KS Statistic[/C][C]0.179487179487179[/C][/ROW]
[ROW][C]p-value[/C][C]0.0131347468582815[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=107097&T=3

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=107097&T=3

As an alternative you can also use a QR Code:  

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

Wicoxon rank sum test with continuity correction (paired)
W5072.5
p-value0.00810904447268412
H0 value0
Alternativetwo.sided
Kolmogorov-Smirnov Test to compare Distributions of two Samples
KS Statistic0.173076923076923
p-value0.0186869369470691
Kolmogorov-Smirnov Test to compare Distributional Shape of two Samples
KS Statistic0.179487179487179
p-value0.0131347468582815



Parameters (Session):
par1 = 1 ; par2 = 2 ; par3 = 0.95 ; par4 = two.sided ; par5 = paired ; par6 = 0.0 ;
Parameters (R input):
par1 = 1 ; par2 = 3 ; par3 = 0.95 ; par4 = two.sided ; par5 = paired ; par6 = 0.0 ;
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')