| *The author of this computation has been verified* | ||||||||||||||||||||||||||||||||
| R Software Module: /rwasp_Tests to Compare Two Means.wasp (opens new window with default values) | ||||||||||||||||||||||||||||||||
| Title produced by software: T-Tests | ||||||||||||||||||||||||||||||||
| Date of computation: Wed, 01 Sep 2010 14:01:06 +0000 | ||||||||||||||||||||||||||||||||
| Cite this page as follows: | ||||||||||||||||||||||||||||||||
| Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL http://www.freestatistics.org/blog/date/2010/Sep/01/t1283349646dmg801ig90m0dkj.htm/, Retrieved Wed, 01 Sep 2010 16:00:47 +0200 | ||||||||||||||||||||||||||||||||
| BibTeX entries for LaTeX users: | ||||||||||||||||||||||||||||||||
@Manual{KEY,
author = {{YOUR NAME}},
publisher = {Office for Research Development and Education},
title = {Statistical Computations at FreeStatistics.org, URL http://www.freestatistics.org/blog/date/2010/Sep/01/t1283349646dmg801ig90m0dkj.htm/},
year = {2010},
}
@Manual{R,
title = {R: A Language and Environment for Statistical Computing},
author = {{R Development Core Team}},
organization = {R Foundation for Statistical Computing},
address = {Vienna, Austria},
year = {2010},
note = {{ISBN} 3-900051-07-0},
url = {http://www.R-project.org},
}
| ||||||||||||||||||||||||||||||||
| Original text written by user: | ||||||||||||||||||||||||||||||||
| IsPrivate? | ||||||||||||||||||||||||||||||||
| No (this computation is public) | ||||||||||||||||||||||||||||||||
| User-defined keywords: | ||||||||||||||||||||||||||||||||
| Dataseries X: | ||||||||||||||||||||||||||||||||
| » Textbox « » Textfile « » CSV « | ||||||||||||||||||||||||||||||||
| 58 51 53 54 59 59 166 56 51 52 64 64 52 57 65 66 62 62 61 61 61 61 54 59 50 50 63 61 58 60 39 41 71 71 52 52 68 63 56 54 54 53 63 59 54 55 54 56 75 75 56 57 78 75 60 59 64 63 64 62 52 51 62 61 55 54 56 57 50 50 50 55 63 64 61 60 53 52 60 55 56 56 53 53 57 59 57 56 56 56 56 57 50 50 52 52 55 55 47 47 45 45 62 63 53 51 52 51 57 55 64 64 59 55 55 57 76 77 62 62 68 68 55 55 45 45 68 68 44 44 62 61 56 53 50 47 53 53 64 62 52 53 53 55 54 55 64 66 55 55 55 55 59 55 70 67 57 58 47 47 47 45 48 44 57 56 51 50 54 54 53 52 59 58 59 59 63 62 66 66 53 50 63 59 56 56 60 55 58 54 50 49 59 59 51 51 62 61 77 77 68 70 76 76 76 77 69 73 71 71 65 64 70 75 92 101 76 75 119 124 65 66 66 70 101 100 75 73 79 76 64 65 69 69 88 86 65 67 80 80 78 80 85 82 82 85 74 73 102 107 65 64 73 74 75 70 57 58 68 69 71 71 71 76 97 98 80 76 66 66 69 70 69 70 55 56 59 61 62 66 70 68 84 86 69 71 88 87 103 101 etc... | ||||||||||||||||||||||||||||||||
| Output produced by software: | ||||||||||||||||||||||||||||||||
Enter (or paste) a matrix (table) containing all data (time) series. Every column represents a different variable and must be delimited by a space or Tab. Every row represents a period in time (or category) and must be delimited by hard returns. The easiest way to enter data is to copy and paste a block of spreadsheet cells. Please, do not use commas or spaces to seperate groups of digits!
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| Charts produced by software: | ||||||||||||||||||||||||||||||||
| ||||||||||||||||||||||||||||||||
| 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): | ||||||||||||||||||||||||||||||||
| 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]), 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]), digits=5) ) a <- table.row.end(a) a<-table.end(a) table.save(a,file='mytable1.tab') | ||||||||||||||||||||||||||||||||
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