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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 computationTue, 16 Dec 2014 13:20:00 +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/16/t1418736027tduu5ndmp0zxx2t.htm/, Retrieved Thu, 16 May 2024 08:26:01 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=269502, Retrieved Thu, 16 May 2024 08:26:01 +0000
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Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact85
Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)
-     [Notched Boxplots] [1.1 AMSI - boxplot] [2014-12-09 11:18:21] [4d39cf209776852399955073f9d0ee7a]
- R  D  [Notched Boxplots] [1.1 AMSI : Notche...] [2014-12-10 13:41:48] [765bd0d5d4a0c852014c120c6930661d]
-    D    [Notched Boxplots] [1.1 Box plot 2014...] [2014-12-16 13:07:31] [765bd0d5d4a0c852014c120c6930661d]
- RMP         [Paired and Unpaired Two Samples Tests about the Mean] [1.1 Two sample T-...] [2014-12-16 13:20:00] [706bcb1d0c5210dc074174906fafd7a3] [Current]
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Dataseries X:
NA	NA
NA	NA
NA	57
NA	NA
52	NA
NA	NA
NA	NA
59	58
NA	NA
52	14
44	53
NA	NA
NA	49
NA	NA
NA	62
NA	30
NA	NA
NA	56
NA	NA
60	NA
NA	48
NA	55
NA	35
NA	NA
NA	41
NA	NA
59	NA
NA	NA
NA	NA
NA	45
NA	NA
NA	47
55	NA
55	53
41	53
NA	41
51	55
52	55
50	46
NA	NA
60	NA
NA	NA
NA	59
29	39
NA	44
NA	60
NA	57
55	NA
64	NA
40	NA
46	NA
NA	46
43	NA
NA	53
51	NA
NA	NA
52	54
NA	NA
66	45
61	60
NA	47
51	50
NA	66
NA	60
NA	NA
NA	53
NA	34
25	NA
NA	NA
46	NA
50	NA
39	58
NA	NA
58	NA
NA	52
58	49
60	63
62	44
63	NA
NA	52
NA	60
NA	53
NA	53
64	52
38	31
NA	NA
48	NA
48	NA
47	49
66	61
NA	NA
NA	62
58	NA
44	NA
NA	NA
43	NA
NA	NA
NA	53
NA	56
45	63
NA	62
NA	66
NA	NA
60	45
55	58
56	NA
NA	53
NA	68
43	NA
NA	58
NA	NA
51	NA
58	58
64	NA
NA	69
NA	NA
51	46
47	NA
59	NA
NA	NA
NA	64
51	NA
64	NA
52	54
NA	NA
NA	NA
NA	NA
NA	NA
56	61
NA	NA
NA	69
NA	64
71	NA
50	59
NA	NA
47	NA
NA	51
NA	65
NA	NA
43	NA
NA	NA
63	NA
NA	47
NA	NA
51	NA
NA	NA
22	NA
NA	58
59	51
NA	NA
66	41
53	NA
NA	NA
NA	64
54	NA
NA	50
NA	NA
53	55
NA	59
36	NA
76	NA
NA	NA
NA	NA
59	77
NA	60
55	NA
58	64
NA	NA
44	46
57	NA
NA	NA
	NA
	NA
	NA
	NA
	NA
	NA
	54
	NA
	56
	65
	NA
	NA
	NA
	NA
	NA
	NA
	NA
	56
	NA
	NA
	NA
	56
	NA
	NA
	NA
	NA
	58
	NA
	NA
	42
	69
	NA
	NA
	NA
	NA
	51
	NA
	64
	NA
	NA
	NA
	NA
	NA
	NA
	NA
	NA
	NA
	NA
	NA
	NA
	NA
	NA
	NA
	NA
	NA
	NA




Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time1 seconds
R Server'George Udny Yule' @ yule.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 & 'George Udny Yule' @ yule.wessa.net \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=269502&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]'George Udny Yule' @ yule.wessa.net[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=269502&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=269502&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 time1 seconds
R Server'George Udny Yule' @ yule.wessa.net







Two Sample t-test (unpaired)
Mean of Sample 152.9883720930233
Mean of Sample 252.7227722772277
t-stat0.17990483193097
df185
p-value0.8574241856695
H0 value0
Alternativetwo.sided
CI Level0.95
CI[-2.64701730892524,3.17821694051631]
F-test to compare two variances
F-stat0.804640072218486
df85
p-value0.303337048150339
H0 value1
Alternativetwo.sided
CI Level0.95
CI[0.535064291905428,1.21846724934038]

\begin{tabular}{lllllllll}
\hline
Two Sample t-test (unpaired) \tabularnewline
Mean of Sample 1 & 52.9883720930233 \tabularnewline
Mean of Sample 2 & 52.7227722772277 \tabularnewline
t-stat & 0.17990483193097 \tabularnewline
df & 185 \tabularnewline
p-value & 0.8574241856695 \tabularnewline
H0 value & 0 \tabularnewline
Alternative & two.sided \tabularnewline
CI Level & 0.95 \tabularnewline
CI & [-2.64701730892524,3.17821694051631] \tabularnewline
F-test to compare two variances \tabularnewline
F-stat & 0.804640072218486 \tabularnewline
df & 85 \tabularnewline
p-value & 0.303337048150339 \tabularnewline
H0 value & 1 \tabularnewline
Alternative & two.sided \tabularnewline
CI Level & 0.95 \tabularnewline
CI & [0.535064291905428,1.21846724934038] \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=269502&T=1

[TABLE]
[ROW][C]Two Sample t-test (unpaired)[/C][/ROW]
[ROW][C]Mean of Sample 1[/C][C]52.9883720930233[/C][/ROW]
[ROW][C]Mean of Sample 2[/C][C]52.7227722772277[/C][/ROW]
[ROW][C]t-stat[/C][C]0.17990483193097[/C][/ROW]
[ROW][C]df[/C][C]185[/C][/ROW]
[ROW][C]p-value[/C][C]0.8574241856695[/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][-2.64701730892524,3.17821694051631][/C][/ROW]
[ROW][C]F-test to compare two variances[/C][/ROW]
[ROW][C]F-stat[/C][C]0.804640072218486[/C][/ROW]
[ROW][C]df[/C][C]85[/C][/ROW]
[ROW][C]p-value[/C][C]0.303337048150339[/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][0.535064291905428,1.21846724934038][/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=269502&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=269502&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 (unpaired)
Mean of Sample 152.9883720930233
Mean of Sample 252.7227722772277
t-stat0.17990483193097
df185
p-value0.8574241856695
H0 value0
Alternativetwo.sided
CI Level0.95
CI[-2.64701730892524,3.17821694051631]
F-test to compare two variances
F-stat0.804640072218486
df85
p-value0.303337048150339
H0 value1
Alternativetwo.sided
CI Level0.95
CI[0.535064291905428,1.21846724934038]







Welch Two Sample t-test (unpaired)
Mean of Sample 152.9883720930233
Mean of Sample 252.7227722772277
t-stat0.181482321013663
df184.482384613712
p-value0.856188249033117
H0 value0
Alternativetwo.sided
CI Level0.95
CI[-2.62175346078746,3.15295309237852]

\begin{tabular}{lllllllll}
\hline
Welch Two Sample t-test (unpaired) \tabularnewline
Mean of Sample 1 & 52.9883720930233 \tabularnewline
Mean of Sample 2 & 52.7227722772277 \tabularnewline
t-stat & 0.181482321013663 \tabularnewline
df & 184.482384613712 \tabularnewline
p-value & 0.856188249033117 \tabularnewline
H0 value & 0 \tabularnewline
Alternative & two.sided \tabularnewline
CI Level & 0.95 \tabularnewline
CI & [-2.62175346078746,3.15295309237852] \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=269502&T=2

[TABLE]
[ROW][C]Welch Two Sample t-test (unpaired)[/C][/ROW]
[ROW][C]Mean of Sample 1[/C][C]52.9883720930233[/C][/ROW]
[ROW][C]Mean of Sample 2[/C][C]52.7227722772277[/C][/ROW]
[ROW][C]t-stat[/C][C]0.181482321013663[/C][/ROW]
[ROW][C]df[/C][C]184.482384613712[/C][/ROW]
[ROW][C]p-value[/C][C]0.856188249033117[/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][-2.62175346078746,3.15295309237852][/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=269502&T=2

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=269502&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 (unpaired)
Mean of Sample 152.9883720930233
Mean of Sample 252.7227722772277
t-stat0.181482321013663
df184.482384613712
p-value0.856188249033117
H0 value0
Alternativetwo.sided
CI Level0.95
CI[-2.62175346078746,3.15295309237852]







Wicoxon rank sum test with continuity correction (unpaired)
W4278
p-value0.861075918302203
H0 value0
Alternativetwo.sided
Kolmogorov-Smirnov Test to compare Distributions of two Samples
KS Statistic0.0807045820861156
p-value0.922785485509566
Kolmogorov-Smirnov Test to compare Distributional Shape of two Samples
KS Statistic0.110407552383145
p-value0.623014160638341

\begin{tabular}{lllllllll}
\hline
Wicoxon rank sum test with continuity correction (unpaired) \tabularnewline
W & 4278 \tabularnewline
p-value & 0.861075918302203 \tabularnewline
H0 value & 0 \tabularnewline
Alternative & two.sided \tabularnewline
Kolmogorov-Smirnov Test to compare Distributions of two Samples \tabularnewline
KS Statistic & 0.0807045820861156 \tabularnewline
p-value & 0.922785485509566 \tabularnewline
Kolmogorov-Smirnov Test to compare Distributional Shape of two Samples \tabularnewline
KS Statistic & 0.110407552383145 \tabularnewline
p-value & 0.623014160638341 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=269502&T=3

[TABLE]
[ROW][C]Wicoxon rank sum test with continuity correction (unpaired)[/C][/ROW]
[ROW][C]W[/C][C]4278[/C][/ROW]
[ROW][C]p-value[/C][C]0.861075918302203[/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]0.0807045820861156[/C][/ROW]
[ROW][C]p-value[/C][C]0.922785485509566[/C][/ROW]
[ROW][C]Kolmogorov-Smirnov Test to compare Distributional Shape of two Samples[/C][/ROW]
[ROW][C]KS Statistic[/C][C]0.110407552383145[/C][/ROW]
[ROW][C]p-value[/C][C]0.623014160638341[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=269502&T=3

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=269502&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 (unpaired)
W4278
p-value0.861075918302203
H0 value0
Alternativetwo.sided
Kolmogorov-Smirnov Test to compare Distributions of two Samples
KS Statistic0.0807045820861156
p-value0.922785485509566
Kolmogorov-Smirnov Test to compare Distributional Shape of two Samples
KS Statistic0.110407552383145
p-value0.623014160638341



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