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*The author of this computation has been verified*
R Software Module: /rwasp_centraltendency.wasp (opens new window with default values)
Title produced by software: Central Tendency
Date of computation: Sun, 20 Dec 2009 16:15:18 -0700
 
Cite this page as follows:
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL http://www.freestatistics.org/blog/date/2009/Dec/21/t1261350958rxkapp2facltpf8.htm/, Retrieved Mon, 21 Dec 2009 00:16:00 +0100
 
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/2009/Dec/21/t1261350958rxkapp2facltpf8.htm/},
    year = {2009},
}
@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 = {2009},
    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 «
2.15418755068342 -1.20867705435185 2.23402074997159 -0.315227856696888 -2.05471111867122 -0.188755235805451 -1.70607988548339 1.31473818526770 4.24600077923484 3.01614099882724 -1.88865472594506 -1.17988420280436 2.93517243273008 3.81666419198670 2.37339834074884 -2.64727172073952 -1.57580042750357 2.23831035286297 -2.32836444385928 -5.05451947276176 -7.29938271711795 1.24786578858060 -1.85142811909361 2.43220645318740 -5.62593007807252 -0.664726380986282 0.641476856006124 -5.6313219882853 0.835799675983572 2.51019230081246 2.49476121131850 -3.52573557314125 2.47478456766280 -2.15782857688021 4.64089426989528 0.0911415552623357 -2.34057414315528 -2.02314875239176 0.60616742530706 1.98646775057574 2.10970012609582 -0.0166472188729180 2.84625223680116 -0.223047331629558 4.86646710195109 -2.40167652490070 1.41841309876503 -0.183355621630165 1.19504251622018 1.41569212113938 -4.87374431587117 2.20007052398130 1.74739380116604 -2.97258774402668 2.17595443105776 etc...
 
Output produced by software:


Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time1 seconds
R Server'Gwilym Jenkins' @ 72.249.127.135


Central Tendency - Ungrouped Data
MeasureValueS.E.Value/S.E.
Arithmetic Mean-2.75712612463064e-180.323411487124367-8.52513356636089e-18
Geometric MeanNaN
Harmonic Mean-1.45747101473654
Quadratic Mean2.78209080734178
Winsorized Mean ( 1 / 25 )-0.003224559956674920.310969286159803-0.0103693840523461
Winsorized Mean ( 2 / 25 )-0.008330249056718150.309843102614015-0.0268853783945467
Winsorized Mean ( 3 / 25 )0.01337747193205580.3042332389342590.0439711057835681
Winsorized Mean ( 4 / 25 )0.01055956143392140.2995693768476310.0352491350919767
Winsorized Mean ( 5 / 25 )0.08118178456300150.2811055500897260.288794669963254
Winsorized Mean ( 6 / 25 )0.04999172452371270.2739039010272180.182515562342228
Winsorized Mean ( 7 / 25 )-0.01651678244119660.259543377234315-0.0636378497390256
Winsorized Mean ( 8 / 25 )-0.02054414700553380.257351187327505-0.0798292295399021
Winsorized Mean ( 9 / 25 )0.02818703999605630.2453513688414500.114884380426144
Winsorized Mean ( 10 / 25 )-0.01463130015365040.238330629044551-0.0613907671553007
Winsorized Mean ( 11 / 25 )0.03081849013601900.2302497665709860.133848084169578
Winsorized Mean ( 12 / 25 )0.06159599742781740.2245631393099930.27429255583566
Winsorized Mean ( 13 / 25 )0.05998070706437390.2226321585240760.269416186152134
Winsorized Mean ( 14 / 25 )0.06040897066832120.2193639934704450.275382343805024
Winsorized Mean ( 15 / 25 )0.04374394134813910.2163076040533100.202230252327875
Winsorized Mean ( 16 / 25 )0.07168692267936260.2098210110348960.341657502867719
Winsorized Mean ( 17 / 25 )0.09408790321802080.2063622002330270.455935743618624
Winsorized Mean ( 18 / 25 )0.09351481688742160.2041596191708130.458047567228175
Winsorized Mean ( 19 / 25 )0.1214772267132890.1985888124594050.611702266652714
Winsorized Mean ( 20 / 25 )0.1255998204405180.1964239466391700.639432322736312
Winsorized Mean ( 21 / 25 )0.1538408469668520.1892127618691320.813057456839274
Winsorized Mean ( 22 / 25 )0.1459445708565890.1804621711041140.80872667087879
Winsorized Mean ( 23 / 25 )0.1210423778948270.1764125694162770.686132390086137
Winsorized Mean ( 24 / 25 )0.08139279686743140.1688299684241700.482099224605310
Winsorized Mean ( 25 / 25 )-0.02650477975517510.154328387841984-0.171742737196952
Trimmed Mean ( 1 / 25 )0.007164560131282060.3026073501842600.023676094208946
Trimmed Mean ( 2 / 25 )0.01813898275940560.2927302850831590.0619648313950594
Trimmed Mean ( 3 / 25 )0.03252443483338590.2817171096252820.115450690505264
Trimmed Mean ( 4 / 25 )0.03966882397567330.2712101071233160.146266023771881
Trimmed Mean ( 5 / 25 )0.04806572663194790.2603795298357240.184598715045968
Trimmed Mean ( 6 / 25 )0.04018095093407800.2533504038522080.158598329914317
Trimmed Mean ( 7 / 25 )0.03817054650997250.2468929895743580.154603606103917
Trimmed Mean ( 8 / 25 )0.04810165951563270.2426740453133450.198215097348062
Trimmed Mean ( 9 / 25 )0.0593920882197720.2379397991772100.249609726599536
Trimmed Mean ( 10 / 25 )0.06412012582942590.2347466280941240.273146099477587
Trimmed Mean ( 11 / 25 )0.07526419554401210.2320894184859600.324289646787861
Trimmed Mean ( 12 / 25 )0.08120613476967970.2302473901422670.352690793669815
Trimmed Mean ( 13 / 25 )0.08370742779797840.2287990411601120.365855675677419
Trimmed Mean ( 14 / 25 )0.08661987305987750.2270266636323970.381540527768724
Trimmed Mean ( 15 / 25 )0.08974021858268180.2250822593452220.398699652490346
Trimmed Mean ( 16 / 25 )0.09508862291227980.2228309536235270.426729865694206
Trimmed Mean ( 17 / 25 )0.0977641221767140.2208701390169220.442631686709011
Trimmed Mean ( 18 / 25 )0.09817998404986930.2185839367592270.449163765213067
Trimmed Mean ( 19 / 25 )0.09870534071230710.2155557026497070.457911061962069
Trimmed Mean ( 20 / 25 )0.09613708289264750.2122817235894180.452874987385112
Trimmed Mean ( 21 / 25 )0.0927890445349350.2077947182516410.446541881890216
Trimmed Mean ( 22 / 25 )0.08575542674323940.2029122795959770.422623149835923
Trimmed Mean ( 23 / 25 )0.07867990039762630.1979024908666940.397569025296526
Trimmed Mean ( 24 / 25 )0.0735636591540030.1912201180288650.384706692540051
Trimmed Mean ( 25 / 25 )0.07258501693982450.1832420556085170.396115491603615
Median0.0911415552623357
Midrange-0.261506444791795
Midmean - Weighted Average at Xnp0.0428670751043052
Midmean - Weighted Average at X(n+1)p0.0981799840498692
Midmean - Empirical Distribution Function0.0981799840498692
Midmean - Empirical Distribution Function - Averaging0.0981799840498692
Midmean - Empirical Distribution Function - Interpolation0.098705340712307
Midmean - Closest Observation0.0428670751043052
Midmean - True Basic - Statistics Graphics Toolkit0.0981799840498692
Midmean - MS Excel (old versions)0.0981799840498692
Number of observations75
 
Charts produced by software:
http://www.freestatistics.org/blog/date/2009/Dec/21/t1261350958rxkapp2facltpf8/1xe3g1261350916.png (open in new window)
http://www.freestatistics.org/blog/date/2009/Dec/21/t1261350958rxkapp2facltpf8/1xe3g1261350916.ps (open in new window)


http://www.freestatistics.org/blog/date/2009/Dec/21/t1261350958rxkapp2facltpf8/2doin1261350916.png (open in new window)
http://www.freestatistics.org/blog/date/2009/Dec/21/t1261350958rxkapp2facltpf8/2doin1261350916.ps (open in new window)


 
Parameters (Session):
 
Parameters (R input):
 
R code (references can be found in the software module):
geomean <- function(x) {
return(exp(mean(log(x))))
}
harmean <- function(x) {
return(1/mean(1/x))
}
quamean <- function(x) {
return(sqrt(mean(x*x)))
}
winmean <- function(x) {
x <-sort(x[!is.na(x)])
n<-length(x)
denom <- 3
nodenom <- n/denom
if (nodenom>40) denom <- n/40
sqrtn = sqrt(n)
roundnodenom = floor(nodenom)
win <- array(NA,dim=c(roundnodenom,2))
for (j in 1:roundnodenom) {
win[j,1] <- (j*x[j+1]+sum(x[(j+1):(n-j)])+j*x[n-j])/n
win[j,2] <- sd(c(rep(x[j+1],j),x[(j+1):(n-j)],rep(x[n-j],j)))/sqrtn
}
return(win)
}
trimean <- function(x) {
x <-sort(x[!is.na(x)])
n<-length(x)
denom <- 3
nodenom <- n/denom
if (nodenom>40) denom <- n/40
sqrtn = sqrt(n)
roundnodenom = floor(nodenom)
tri <- array(NA,dim=c(roundnodenom,2))
for (j in 1:roundnodenom) {
tri[j,1] <- mean(x,trim=j/n)
tri[j,2] <- sd(x[(j+1):(n-j)]) / sqrt(n-j*2)
}
return(tri)
}
midrange <- function(x) {
return((max(x)+min(x))/2)
}
q1 <- function(data,n,p,i,f) {
np <- n*p;
i <<- floor(np)
f <<- np - i
qvalue <- (1-f)*data[i] + f*data[i+1]
}
q2 <- function(data,n,p,i,f) {
np <- (n+1)*p
i <<- floor(np)
f <<- np - i
qvalue <- (1-f)*data[i] + f*data[i+1]
}
q3 <- function(data,n,p,i,f) {
np <- n*p
i <<- floor(np)
f <<- np - i
if (f==0) {
qvalue <- data[i]
} else {
qvalue <- data[i+1]
}
}
q4 <- function(data,n,p,i,f) {
np <- n*p
i <<- floor(np)
f <<- np - i
if (f==0) {
qvalue <- (data[i]+data[i+1])/2
} else {
qvalue <- data[i+1]
}
}
q5 <- function(data,n,p,i,f) {
np <- (n-1)*p
i <<- floor(np)
f <<- np - i
if (f==0) {
qvalue <- data[i+1]
} else {
qvalue <- data[i+1] + f*(data[i+2]-data[i+1])
}
}
q6 <- function(data,n,p,i,f) {
np <- n*p+0.5
i <<- floor(np)
f <<- np - i
qvalue <- data[i]
}
q7 <- function(data,n,p,i,f) {
np <- (n+1)*p
i <<- floor(np)
f <<- np - i
if (f==0) {
qvalue <- data[i]
} else {
qvalue <- f*data[i] + (1-f)*data[i+1]
}
}
q8 <- function(data,n,p,i,f) {
np <- (n+1)*p
i <<- floor(np)
f <<- np - i
if (f==0) {
qvalue <- data[i]
} else {
if (f == 0.5) {
qvalue <- (data[i]+data[i+1])/2
} else {
if (f < 0.5) {
qvalue <- data[i]
} else {
qvalue <- data[i+1]
}
}
}
}
midmean <- function(x,def) {
x <-sort(x[!is.na(x)])
n<-length(x)
if (def==1) {
qvalue1 <- q1(x,n,0.25,i,f)
qvalue3 <- q1(x,n,0.75,i,f)
}
if (def==2) {
qvalue1 <- q2(x,n,0.25,i,f)
qvalue3 <- q2(x,n,0.75,i,f)
}
if (def==3) {
qvalue1 <- q3(x,n,0.25,i,f)
qvalue3 <- q3(x,n,0.75,i,f)
}
if (def==4) {
qvalue1 <- q4(x,n,0.25,i,f)
qvalue3 <- q4(x,n,0.75,i,f)
}
if (def==5) {
qvalue1 <- q5(x,n,0.25,i,f)
qvalue3 <- q5(x,n,0.75,i,f)
}
if (def==6) {
qvalue1 <- q6(x,n,0.25,i,f)
qvalue3 <- q6(x,n,0.75,i,f)
}
if (def==7) {
qvalue1 <- q7(x,n,0.25,i,f)
qvalue3 <- q7(x,n,0.75,i,f)
}
if (def==8) {
qvalue1 <- q8(x,n,0.25,i,f)
qvalue3 <- q8(x,n,0.75,i,f)
}
midm <- 0
myn <- 0
roundno4 <- round(n/4)
round3no4 <- round(3*n/4)
for (i in 1:n) {
if ((x[i]>=qvalue1) & (x[i]<=qvalue3)){
midm = midm + x[i]
myn = myn + 1
}
}
midm = midm / myn
return(midm)
}
(arm <- mean(x))
sqrtn <- sqrt(length(x))
(armse <- sd(x) / sqrtn)
(armose <- arm / armse)
(geo <- geomean(x))
(har <- harmean(x))
(qua <- quamean(x))
(win <- winmean(x))
(tri <- trimean(x))
(midr <- midrange(x))
midm <- array(NA,dim=8)
for (j in 1:8) midm[j] <- midmean(x,j)
midm
bitmap(file='test1.png')
lb <- win[,1] - 2*win[,2]
ub <- win[,1] + 2*win[,2]
if ((ylimmin == '') | (ylimmax == '')) plot(win[,1],type='b',main=main, xlab='j', pch=19, ylab='Winsorized Mean(j/n)', ylim=c(min(lb),max(ub))) else plot(win[,1],type='l',main=main, xlab='j', pch=19, ylab='Winsorized Mean(j/n)', ylim=c(ylimmin,ylimmax))
lines(ub,lty=3)
lines(lb,lty=3)
grid()
dev.off()
bitmap(file='test2.png')
lb <- tri[,1] - 2*tri[,2]
ub <- tri[,1] + 2*tri[,2]
if ((ylimmin == '') | (ylimmax == '')) plot(tri[,1],type='b',main=main, xlab='j', pch=19, ylab='Trimmed Mean(j/n)', ylim=c(min(lb),max(ub))) else plot(tri[,1],type='l',main=main, xlab='j', pch=19, ylab='Trimmed Mean(j/n)', ylim=c(ylimmin,ylimmax))
lines(ub,lty=3)
lines(lb,lty=3)
grid()
dev.off()
load(file='createtable')
a<-table.start()
a<-table.row.start(a)
a<-table.element(a,'Central Tendency - Ungrouped Data',4,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Measure',header=TRUE)
a<-table.element(a,'Value',header=TRUE)
a<-table.element(a,'S.E.',header=TRUE)
a<-table.element(a,'Value/S.E.',header=TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,hyperlink('http://www.xycoon.com/arithmetic_mean.htm', 'Arithmetic Mean', 'click to view the definition of the Arithmetic Mean'),header=TRUE)
a<-table.element(a,arm)
a<-table.element(a,hyperlink('http://www.xycoon.com/arithmetic_mean_standard_error.htm', armse, 'click to view the definition of the Standard Error of the Arithmetic Mean'))
a<-table.element(a,armose)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,hyperlink('http://www.xycoon.com/geometric_mean.htm', 'Geometric Mean', 'click to view the definition of the Geometric Mean'),header=TRUE)
a<-table.element(a,geo)
a<-table.element(a,'')
a<-table.element(a,'')
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,hyperlink('http://www.xycoon.com/harmonic_mean.htm', 'Harmonic Mean', 'click to view the definition of the Harmonic Mean'),header=TRUE)
a<-table.element(a,har)
a<-table.element(a,'')
a<-table.element(a,'')
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,hyperlink('http://www.xycoon.com/quadratic_mean.htm', 'Quadratic Mean', 'click to view the definition of the Quadratic Mean'),header=TRUE)
a<-table.element(a,qua)
a<-table.element(a,'')
a<-table.element(a,'')
a<-table.row.end(a)
for (j in 1:length(win[,1])) {
a<-table.row.start(a)
mylabel <- paste('Winsorized Mean (',j)
mylabel <- paste(mylabel,'/')
mylabel <- paste(mylabel,length(win[,1]))
mylabel <- paste(mylabel,')')
a<-table.element(a,hyperlink('http://www.xycoon.com/winsorized_mean.htm', mylabel, 'click to view the definition of the Winsorized Mean'),header=TRUE)
a<-table.element(a,win[j,1])
a<-table.element(a,win[j,2])
a<-table.element(a,win[j,1]/win[j,2])
a<-table.row.end(a)
}
for (j in 1:length(tri[,1])) {
a<-table.row.start(a)
mylabel <- paste('Trimmed Mean (',j)
mylabel <- paste(mylabel,'/')
mylabel <- paste(mylabel,length(tri[,1]))
mylabel <- paste(mylabel,')')
a<-table.element(a,hyperlink('http://www.xycoon.com/arithmetic_mean.htm', mylabel, 'click to view the definition of the Trimmed Mean'),header=TRUE)
a<-table.element(a,tri[j,1])
a<-table.element(a,tri[j,2])
a<-table.element(a,tri[j,1]/tri[j,2])
a<-table.row.end(a)
}
a<-table.row.start(a)
a<-table.element(a,hyperlink('http://www.xycoon.com/median_1.htm', 'Median', 'click to view the definition of the Median'),header=TRUE)
a<-table.element(a,median(x))
a<-table.element(a,'')
a<-table.element(a,'')
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,hyperlink('http://www.xycoon.com/midrange.htm', 'Midrange', 'click to view the definition of the Midrange'),header=TRUE)
a<-table.element(a,midr)
a<-table.element(a,'')
a<-table.element(a,'')
a<-table.row.end(a)
a<-table.row.start(a)
mymid <- hyperlink('http://www.xycoon.com/midmean.htm', 'Midmean', 'click to view the definition of the Midmean')
mylabel <- paste(mymid,hyperlink('http://www.xycoon.com/method_1.htm','Weighted Average at Xnp',''),sep=' - ')
a<-table.element(a,mylabel,header=TRUE)
a<-table.element(a,midm[1])
a<-table.element(a,'')
a<-table.element(a,'')
a<-table.row.end(a)
a<-table.row.start(a)
mymid <- hyperlink('http://www.xycoon.com/midmean.htm', 'Midmean', 'click to view the definition of the Midmean')
mylabel <- paste(mymid,hyperlink('http://www.xycoon.com/method_2.htm','Weighted Average at X(n+1)p',''),sep=' - ')
a<-table.element(a,mylabel,header=TRUE)
a<-table.element(a,midm[2])
a<-table.element(a,'')
a<-table.element(a,'')
a<-table.row.end(a)
a<-table.row.start(a)
mymid <- hyperlink('http://www.xycoon.com/midmean.htm', 'Midmean', 'click to view the definition of the Midmean')
mylabel <- paste(mymid,hyperlink('http://www.xycoon.com/method_3.htm','Empirical Distribution Function',''),sep=' - ')
a<-table.element(a,mylabel,header=TRUE)
a<-table.element(a,midm[3])
a<-table.element(a,'')
a<-table.element(a,'')
a<-table.row.end(a)
a<-table.row.start(a)
mymid <- hyperlink('http://www.xycoon.com/midmean.htm', 'Midmean', 'click to view the definition of the Midmean')
mylabel <- paste(mymid,hyperlink('http://www.xycoon.com/method_4.htm','Empirical Distribution Function - Averaging',''),sep=' - ')
a<-table.element(a,mylabel,header=TRUE)
a<-table.element(a,midm[4])
a<-table.element(a,'')
a<-table.element(a,'')
a<-table.row.end(a)
a<-table.row.start(a)
mymid <- hyperlink('http://www.xycoon.com/midmean.htm', 'Midmean', 'click to view the definition of the Midmean')
mylabel <- paste(mymid,hyperlink('http://www.xycoon.com/method_5.htm','Empirical Distribution Function - Interpolation',''),sep=' - ')
a<-table.element(a,mylabel,header=TRUE)
a<-table.element(a,midm[5])
a<-table.element(a,'')
a<-table.element(a,'')
a<-table.row.end(a)
a<-table.row.start(a)
mymid <- hyperlink('http://www.xycoon.com/midmean.htm', 'Midmean', 'click to view the definition of the Midmean')
mylabel <- paste(mymid,hyperlink('http://www.xycoon.com/method_6.htm','Closest Observation',''),sep=' - ')
a<-table.element(a,mylabel,header=TRUE)
a<-table.element(a,midm[6])
a<-table.element(a,'')
a<-table.element(a,'')
a<-table.row.end(a)
a<-table.row.start(a)
mymid <- hyperlink('http://www.xycoon.com/midmean.htm', 'Midmean', 'click to view the definition of the Midmean')
mylabel <- paste(mymid,hyperlink('http://www.xycoon.com/method_7.htm','True Basic - Statistics Graphics Toolkit',''),sep=' - ')
a<-table.element(a,mylabel,header=TRUE)
a<-table.element(a,midm[7])
a<-table.element(a,'')
a<-table.element(a,'')
a<-table.row.end(a)
a<-table.row.start(a)
mymid <- hyperlink('http://www.xycoon.com/midmean.htm', 'Midmean', 'click to view the definition of the Midmean')
mylabel <- paste(mymid,hyperlink('http://www.xycoon.com/method_8.htm','MS Excel (old versions)',''),sep=' - ')
a<-table.element(a,mylabel,header=TRUE)
a<-table.element(a,midm[8])
a<-table.element(a,'')
a<-table.element(a,'')
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Number of observations',header=TRUE)
a<-table.element(a,length(x))
a<-table.element(a,'')
a<-table.element(a,'')
a<-table.row.end(a)
a<-table.end(a)
table.save(a,file='mytable.tab')
 





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