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Description of Statistical Computation

Author's title

Author*Unverified author*
R Software Modulerwasp_correlation.wasp
Title produced by softwarePearson Correlation
Date of computationTue, 19 Aug 2014 14:41:44 +0100
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/Aug/19/t1408455824yr0eg9bmqyzx53n.htm/, Retrieved Thu, 16 May 2024 20:47:04 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=235715, Retrieved Thu, 16 May 2024 20:47:04 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact175

Tree of Dependent Computations

Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)
-       [Pearson Correlation] [] [2014-08-19 13:41:44] [d41d8cd98f00b204e9800998ecf8427e] [Current]
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Dataset

Dataseries X:
Download CSV
Histogram
Boxplots 
51.7
57.8
31.1
55.3
21.3
34.7
16.7
25.5
3.6
24.5
40.3
6.7
55.3
20.2
39.1
42.9
42.1
47.7
44.1
40.5
21.3
12.6
38.4
41.7
55.3
41.7
57.7
38.6
33.8
30
12.3
34.8
18
41.3
50.7
32.4
42.9
39.8
34.7
12.8
42.3
56.6
43.9
35.9
43.9
42
35.1
33.1
55.4
44.4
59.7
Dataseries Y:
Download CSV
Histogram 
4.2
4.4
5.5
4.5
4.9
2.3
3.7
5.3
21.8
5
5.3
1.8
1.3
3.5
3.1
1.2
3.5
4.5
9.6
1.8
7.3
3.2
5.6
1.7
5.6
7
2.1
2.8
5.9
1
4.1
5.7
4.4
4.7
1.3
4
5
2
5.1
2.8
6.1
1.7
5.6
5
1.9
1.1
4.6
2.2
3
2.7
1.4

Tables (Output of Computation)





Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time2 seconds
R Server'Sir Maurice George Kendall' @ kendall.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 & 2 seconds \tabularnewline
R Server & 'Sir Maurice George Kendall' @ kendall.wessa.net \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=235715&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]2 seconds[/C][/ROW]
[ROW][C]R Server[/C][C]'Sir Maurice George Kendall' @ kendall.wessa.net[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=235715&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=235715&T=0

As an alternative you can also use a QR Code:  
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 time2 seconds
R Server'Sir Maurice George Kendall' @ kendall.wessa.net






Pearson Product Moment Correlation - Ungrouped Data
StatisticVariable XVariable Y
Mean36.94509803921574.1921568627451
Biased Variance193.8397308727419.60346789696271
Biased Standard Deviation13.92263376207043.09894625590098
Covariance-14.9312392156863
Correlation-0.33928154577602
Determination0.115111967304166
T-Test-2.52472521390804
p-value (2 sided)0.0148666309438953
p-value (1 sided)0.00743331547194764
Degrees of Freedom49
Number of Observations51

\begin{tabular}{lllllllll}
\hline
Pearson Product Moment Correlation - Ungrouped Data \tabularnewline
Statistic & Variable X & Variable Y \tabularnewline
Mean & 36.9450980392157 & 4.1921568627451 \tabularnewline
Biased Variance & 193.839730872741 & 9.60346789696271 \tabularnewline
Biased Standard Deviation & 13.9226337620704 & 3.09894625590098 \tabularnewline
Covariance & -14.9312392156863 \tabularnewline
Correlation & -0.33928154577602 \tabularnewline
Determination & 0.115111967304166 \tabularnewline
T-Test & -2.52472521390804 \tabularnewline
p-value (2 sided) & 0.0148666309438953 \tabularnewline
p-value (1 sided) & 0.00743331547194764 \tabularnewline
Degrees of Freedom & 49 \tabularnewline
Number of Observations & 51 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=235715&T=1

[TABLE]
[ROW][C]Pearson Product Moment Correlation - Ungrouped Data[/C][/ROW]
[ROW][C]Statistic[/C][C]Variable X[/C][C]Variable Y[/C][/ROW]
[ROW][C]Mean[/C][C]36.9450980392157[/C][C]4.1921568627451[/C][/ROW]
[ROW][C]Biased Variance[/C][C]193.839730872741[/C][C]9.60346789696271[/C][/ROW]
[ROW][C]Biased Standard Deviation[/C][C]13.9226337620704[/C][C]3.09894625590098[/C][/ROW]
[ROW][C]Covariance[/C][C]-14.9312392156863[/C][/ROW]
[ROW][C]Correlation[/C][C]-0.33928154577602[/C][/ROW]
[ROW][C]Determination[/C][C]0.115111967304166[/C][/ROW]
[ROW][C]T-Test[/C][C]-2.52472521390804[/C][/ROW]
[ROW][C]p-value (2 sided)[/C][C]0.0148666309438953[/C][/ROW]
[ROW][C]p-value (1 sided)[/C][C]0.00743331547194764[/C][/ROW]
[ROW][C]Degrees of Freedom[/C][C]49[/C][/ROW]
[ROW][C]Number of Observations[/C][C]51[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=235715&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=235715&T=1

As an alternative you can also use a QR Code:  
QR Code


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

Pearson Product Moment Correlation - Ungrouped Data
StatisticVariable XVariable Y
Mean36.94509803921574.1921568627451
Biased Variance193.8397308727419.60346789696271
Biased Standard Deviation13.92263376207043.09894625590098
Covariance-14.9312392156863
Correlation-0.33928154577602
Determination0.115111967304166
T-Test-2.52472521390804
p-value (2 sided)0.0148666309438953
p-value (1 sided)0.00743331547194764
Degrees of Freedom49
Number of Observations51






Normality Tests
> jarque.x
	Jarque-Bera Normality Test
data:  x
JB = 2.36, p-value = 0.3073
alternative hypothesis: greater

> jarque.y
	Jarque-Bera Normality Test
data:  y
JB = 783.1245, p-value < 2.2e-16
alternative hypothesis: greater

> ad.x
	Anderson-Darling normality test
data:  x
A = 0.8006, p-value = 0.03558

> ad.y
	Anderson-Darling normality test
data:  y
A = 2.9255, p-value = 1.849e-07


\begin{tabular}{lllllllll}
\hline
Normality Tests \tabularnewline

> jarque.x
	Jarque-Bera Normality Test
data:  x
JB = 2.36, p-value = 0.3073
alternative hypothesis: greater

 \tabularnewline

> jarque.y
	Jarque-Bera Normality Test
data:  y
JB = 783.1245, p-value < 2.2e-16
alternative hypothesis: greater

 \tabularnewline

> ad.x
	Anderson-Darling normality test
data:  x
A = 0.8006, p-value = 0.03558

 \tabularnewline

> ad.y
	Anderson-Darling normality test
data:  y
A = 2.9255, p-value = 1.849e-07

 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=235715&T=2

[TABLE]
[ROW][C]Normality Tests[/C][/ROW]
[ROW][C]
> jarque.x
	Jarque-Bera Normality Test
data:  x
JB = 2.36, p-value = 0.3073
alternative hypothesis: greater

[/C][/ROW]
[ROW][C]
> jarque.y
	Jarque-Bera Normality Test
data:  y
JB = 783.1245, p-value < 2.2e-16
alternative hypothesis: greater

[/C][/ROW]
[ROW][C]
> ad.x
	Anderson-Darling normality test
data:  x
A = 0.8006, p-value = 0.03558

[/C][/ROW]
[ROW][C]
> ad.y
	Anderson-Darling normality test
data:  y
A = 2.9255, p-value = 1.849e-07

[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=235715&T=2

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=235715&T=2

As an alternative you can also use a QR Code:  
QR Code


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

Normality Tests
> jarque.x
	Jarque-Bera Normality Test
data:  x
JB = 2.36, p-value = 0.3073
alternative hypothesis: greater

> jarque.y
	Jarque-Bera Normality Test
data:  y
JB = 783.1245, p-value < 2.2e-16
alternative hypothesis: greater

> ad.x
	Anderson-Darling normality test
data:  x
A = 0.8006, p-value = 0.03558

> ad.y
	Anderson-Darling normality test
data:  y
A = 2.9255, p-value = 1.849e-07


Figures (Output of Computation)

Input Parameters & R Code

Parameters (Session):
Parameters (R input):
R code (references can be found in the software module):
x <- x[!is.na(y)]
y <- y[!is.na(y)]
y <- y[!is.na(x)]
x <- x[!is.na(x)]
bitmap(file='test1.png')
histx <- hist(x, plot=FALSE)
histy <- hist(y, plot=FALSE)
maxcounts <- max(c(histx$counts, histx$counts))
xrange <- c(min(x),max(x))
yrange <- c(min(y),max(y))
nf <- layout(matrix(c(2,0,1,3),2,2,byrow=TRUE), c(3,1), c(1,3), TRUE)
par(mar=c(4,4,1,1))
plot(x, y, xlim=xrange, ylim=yrange, xlab=xlab, ylab=ylab, sub=main)
par(mar=c(0,4,1,1))
barplot(histx$counts, axes=FALSE, ylim=c(0, maxcounts), space=0)
par(mar=c(4,0,1,1))
barplot(histy$counts, axes=FALSE, xlim=c(0, maxcounts), space=0, horiz=TRUE)
dev.off()
lx = length(x)
makebiased = (lx-1)/lx
varx = var(x)*makebiased
vary = var(y)*makebiased
corxy <- cor.test(x,y,method='pearson', na.rm = T)
cxy <- as.matrix(corxy$estimate)[1,1]
load(file='createtable')
a<-table.start()
a<-table.row.start(a)
a<-table.element(a,'Pearson Product Moment Correlation - Ungrouped Data',3,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Statistic',1,TRUE)
a<-table.element(a,'Variable X',1,TRUE)
a<-table.element(a,'Variable Y',1,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,hyperlink('arithmetic_mean.htm','Mean',''),header=TRUE)
a<-table.element(a,mean(x))
a<-table.element(a,mean(y))
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,hyperlink('biased.htm','Biased Variance',''),header=TRUE)
a<-table.element(a,varx)
a<-table.element(a,vary)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,hyperlink('biased1.htm','Biased Standard Deviation',''),header=TRUE)
a<-table.element(a,sqrt(varx))
a<-table.element(a,sqrt(vary))
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,hyperlink('covariance.htm','Covariance',''),header=TRUE)
a<-table.element(a,cov(x,y),2)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,hyperlink('pearson_correlation.htm','Correlation',''),header=TRUE)
a<-table.element(a,cxy,2)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,hyperlink('coeff_of_determination.htm','Determination',''),header=TRUE)
a<-table.element(a,cxy*cxy,2)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,hyperlink('ttest_statistic.htm','T-Test',''),header=TRUE)
a<-table.element(a,as.matrix(corxy$statistic)[1,1],2)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'p-value (2 sided)',header=TRUE)
a<-table.element(a,(p2 <- as.matrix(corxy$p.value)[1,1]),2)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'p-value (1 sided)',header=TRUE)
a<-table.element(a,p2/2,2)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Degrees of Freedom',header=TRUE)
a<-table.element(a,lx-2,2)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Number of Observations',header=TRUE)
a<-table.element(a,lx,2)
a<-table.row.end(a)
a<-table.end(a)
table.save(a,file='mytable.tab')
library(moments)
library(nortest)
jarque.x <- jarque.test(x)
jarque.y <- jarque.test(y)
if(lx>7) {
ad.x <- ad.test(x)
ad.y <- ad.test(y)
}
a<-table.start()
a<-table.row.start(a)
a<-table.element(a,'Normality Tests',1,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,paste('
',RC.texteval('jarque.x'),'
',sep=''))
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,paste('
',RC.texteval('jarque.y'),'
',sep=''))
a<-table.row.end(a)
if(lx>7) {
a<-table.row.start(a)
a<-table.element(a,paste('
',RC.texteval('ad.x'),'
',sep=''))
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,paste('
',RC.texteval('ad.y'),'
',sep=''))
a<-table.row.end(a)
}
a<-table.end(a)
table.save(a,file='mytable1.tab')
library(car)
bitmap(file='test2.png')
qq.plot(x,main='QQplot of variable x')
dev.off()
bitmap(file='test3.png')
qq.plot(y,main='QQplot of variable y')
dev.off()