Free Statistics

of Irreproducible Research!

Author's title

Author*Unverified author*
R Software Modulerwasp_edauni.wasp
Title produced by softwareUnivariate Explorative Data Analysis
Date of computationSun, 26 Oct 2008 08:31:29 -0600
Cite this page as followsStatistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?v=date/2008/Oct/26/t1225031634o1o214ciimg7t51.htm/, Retrieved Sun, 19 May 2024 15:41:49 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=18898, Retrieved Sun, 19 May 2024 15:41:49 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact179
Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)
F     [Univariate Explorative Data Analysis] [Investigating dis...] [2007-10-22 19:45:25] [b9964c45117f7aac638ab9056d451faa]
F   PD    [Univariate Explorative Data Analysis] [inv distribuition...] [2008-10-26 14:31:29] [54e3d3004a715f41ac868f539d95466f] [Current]
Feedback Forum
2008-10-31 16:12:30 [2df1bcd103d52957f4a39bd4617794c8] [reply
De student besluit correct dat het model geldig is aangezien aan alle voorwaarden voldaan is.

Echter de student neemt, naar mijn mening, niet steeds de meest accurate grafiek in overweging om conclusie te trekken.

Assumptie 1: Hiervoor had student eventueel de lagplot kunnen oproepen om zo het verband tussen het verleden op de xas en het heden op de yas te concluderen. En vervolgens geen autocorrelatie vast te stellen.

Assumptie 2: Het histogram geeft inderdaad een vaste verdeling weer.

Assumptie 3: Run sequence plot, op lange termijn bekijken om zo te concluderen dat de verschillende punten ongeveer op een rechte liggen.

Assumptie 4: De spreiding over de tijd heen is, zoals student correct besluit, vrij gelijk.
2008-11-02 15:24:15 [Elias Van Deun] [reply
Assumptie 1: Hiervoor had hij beter de lag plot gebruikt. Daarop zie je dat er geen autocorrelatie is.

Assumptie 2: Deze werd juist getest.

Assumptie 3: Om dit uit te testen, gebruik je beter de run sequence plot. De constante gaat op lange termijn op en neer. Dit is niet stabiel.

Assumptie 4: Hier gebruikt hij terug de verkeerde grafiek. We hebben opnieuw de run sequence plot nodig om de spreiding na te gaan. Deze is inderdaad redelijk gelijk.

Hij heeft de juiste conclusie getrokken: Dit is een geldig model, er is aan alle voorwaarden voldaan.

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Dataseries X:
3353
3480
3098
2944
3389
3497
4404
3849
3734
3060
3507
3287
3215
3764
2734
2837
2766
3851
3289
3848
3348
3682
4058
3655
3811
3341
3032
3475
3353
3186
3902
4164
3499
4145
3796
3711
3949
3740
3243
4407
4814
3908
5250
3937
4004
5560
3922
3759
4138
4634
3996
4308
4142
4429
5219
4929
5754
5592
4163
4962
5208
4755
4491
5732
5730
5024
6056
4901
5353
5578
4618
4724
5011
5298
4143
4617
4727
4207
5112
4190
4098
5071
4177
4598
3757
5591
4218
3780
4336
4870
4422
4727
4459




Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time3 seconds
R Server'George Udny Yule' @ 72.249.76.132

\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 & 3 seconds \tabularnewline
R Server & 'George Udny Yule' @ 72.249.76.132 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=18898&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]3 seconds[/C][/ROW]
[ROW][C]R Server[/C][C]'George Udny Yule' @ 72.249.76.132[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=18898&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=18898&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 time3 seconds
R Server'George Udny Yule' @ 72.249.76.132







Descriptive Statistics
# observations93
minimum2734
Q13682
median4142
mean4197.87096774194
Q34727
maximum6056

\begin{tabular}{lllllllll}
\hline
Descriptive Statistics \tabularnewline
# observations & 93 \tabularnewline
minimum & 2734 \tabularnewline
Q1 & 3682 \tabularnewline
median & 4142 \tabularnewline
mean & 4197.87096774194 \tabularnewline
Q3 & 4727 \tabularnewline
maximum & 6056 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=18898&T=1

[TABLE]
[ROW][C]Descriptive Statistics[/C][/ROW]
[ROW][C]# observations[/C][C]93[/C][/ROW]
[ROW][C]minimum[/C][C]2734[/C][/ROW]
[ROW][C]Q1[/C][C]3682[/C][/ROW]
[ROW][C]median[/C][C]4142[/C][/ROW]
[ROW][C]mean[/C][C]4197.87096774194[/C][/ROW]
[ROW][C]Q3[/C][C]4727[/C][/ROW]
[ROW][C]maximum[/C][C]6056[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=18898&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=18898&T=1

As an alternative you can also use a QR Code:  

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

Descriptive Statistics
# observations93
minimum2734
Q13682
median4142
mean4197.87096774194
Q34727
maximum6056



Parameters (Session):
par1 = 0 ; par2 = 12 ;
Parameters (R input):
par1 = 0 ; par2 = 12 ;
R code (references can be found in the software module):
par1 <- as.numeric(par1)
par2 <- as.numeric(par2)
x <- as.ts(x)
library(lattice)
bitmap(file='pic1.png')
plot(x,type='l',main='Run Sequence Plot',xlab='time or index',ylab='value')
grid()
dev.off()
bitmap(file='pic2.png')
hist(x)
grid()
dev.off()
bitmap(file='pic3.png')
if (par1 > 0)
{
densityplot(~x,col='black',main=paste('Density Plot bw = ',par1),bw=par1)
} else {
densityplot(~x,col='black',main='Density Plot')
}
dev.off()
bitmap(file='pic4.png')
qqnorm(x)
grid()
dev.off()
if (par2 > 0)
{
bitmap(file='lagplot.png')
dum <- cbind(lag(x,k=1),x)
dum
dum1 <- dum[2:length(x),]
dum1
z <- as.data.frame(dum1)
z
plot(z,main=paste('Lag plot, lowess, and regression line'))
lines(lowess(z))
abline(lm(z))
dev.off()
bitmap(file='pic5.png')
acf(x,lag.max=par2,main='Autocorrelation Function')
grid()
dev.off()
}
summary(x)
load(file='createtable')
a<-table.start()
a<-table.row.start(a)
a<-table.element(a,'Descriptive Statistics',2,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'# observations',header=TRUE)
a<-table.element(a,length(x))
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'minimum',header=TRUE)
a<-table.element(a,min(x))
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Q1',header=TRUE)
a<-table.element(a,quantile(x,0.25))
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'median',header=TRUE)
a<-table.element(a,median(x))
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'mean',header=TRUE)
a<-table.element(a,mean(x))
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Q3',header=TRUE)
a<-table.element(a,quantile(x,0.75))
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'maximum',header=TRUE)
a<-table.element(a,max(x))
a<-table.row.end(a)
a<-table.end(a)
table.save(a,file='mytable.tab')