FreeStatistics.org

Free Statistics

of Irreproducible Research!

Description of Statistical Computation

Author's title

Author*The author of this computation has been verified*
R Software Modulerwasp_cronbach.wasp
Title produced by softwareCronbach Alpha
Date of computationSat, 23 Oct 2010 15:57:24 +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/2010/Oct/23/t1287849361snky6sg8coiqjgn.htm/, Retrieved Wed, 11 Feb 2026 02:05:49 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=87738, Retrieved Wed, 11 Feb 2026 02:05:49 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact389

Tree of Dependent Computations

Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)
-       [Cronbach Alpha] [KnowingPeople ] [2010-10-23 15:57:24] [d76b387543b13b5e3afd8ff9e5fdc89f] [Current]
Feedback Forum

Post a new message

Dataset

Dataseries X:
Download CSV
Histogram
Boxplots 
4	4	3	3
2	2	2	2
2	4	4	2
2	3	1	1
2	3	2	3
2	1	2	2
5	4	3	4
4	3	2	2
4	4	2	4
2	1	2	1
4	4	4	4
2	3	3	3
4	4	4	4
4	4	2	2
1	1	3	2
4	4	3	2
3	2	3	3
4	4	4	3
1	2	2	2
2	3	2	2
1	3	2	1
4	3	3	4
4	3	4	4
1	2	2	2
4	4	3	4
5	4	4	4
4	4	3	4
4	4	3	3
4	4	3	3
2	2	2	2
2	2	2	2
4	4	4	2
4	3	3	4
2	2	3	1
3	2	2	4
4	4	4	4
3	3	3	1
2	2	2	2
4	4	3	3
4	4	4	4
3	3	4	3
1	1	2	1
2	2	1	3
4	2	2	2
2	2	3	1
3	4	3	3
4	3	4	4
1	2	2	1
3	2	3	4
4	4	4	4
1	1	2	1
4	5	2	4
3	2	3	4
1	3	2	2
1	4	4	4
4	4	3	3
4	3	3	2
4	4	4	4
2	2	4	2
4	3	4	4
2	2	2	2
4	4	4	4
5	5	4	5
3	3	4	4
2	1	2	1
4	3	3	3
4	4	3	4
2	2	2	1
3	3	4	3
1	1	1	1
4	3	3	4
4	2	3	4
4	3	2	2
4	4	2	4
3	3	3	3
4	4	3	4
3	4	3	4
3	3	3	4
2	2	3	1
1	1	2	2
2	2	2	1
4	3	3	3
3	4	3	3
5	1	2	3
1	1	2	1
3	3	3	3
2	2	2	2
3	2	3	3
4	3	3	4
3	2	2	2
3	2	3	2
4	3	3	3
4	4	4	4
4	4	4	4
2	2	3	4
2	2	2	2
1	1	1	1
1	2	2	2
4	3	3	4
2	3	3	3
4	4	5	4
3	4	4	4
5	4	5	3
1	NA	2	2
1	1	1	1
2	3	3	2
4	2	3	2
4	3	4	4
3	3	2	2
4	2	2	1
4	3	3	2
5	2	4	4
1	2	2	2
4	3	3	3
4	2	3	3
4	3	4	3
2	4	4	4
2	2	2	2
4	4	3	4
3	3	2	4
3	3	3	3
4	4	4	4
2	2	2	3
4	3	4	4
4	4	4	3
1	1	2	2
4	4	3	3
4	4	3	4
3	2	3	2
1	1	3	1
4	4	4	2
3	2	3	4
2	2	2	2
3	3	3	2
4	3	3	3
2	2	3	2
4	3	4	4
4	3	3	3
3	4	4	4
4	3	4	3
4	4	4	4
4	3	3	4
4	4	3	3
3	3	2	2
3	2	3	2
1	1	1	1
2	2	2	2
4	4	4	3
4	4	4	4
3	3	3	3
3	3	3	3
4	3	4	4
3	2	2	2
4	NA	4	4
4	4	3	3
4	2	3	2

Tables (Output of Computation)





Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time0 seconds
R Server'Gwilym Jenkins' @ 72.249.127.135

\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 & 0 seconds \tabularnewline
R Server & 'Gwilym Jenkins' @ 72.249.127.135 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=87738&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]0 seconds[/C][/ROW]
[ROW][C]R Server[/C][C]'Gwilym Jenkins' @ 72.249.127.135[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=87738&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=87738&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 time0 seconds
R Server'Gwilym Jenkins' @ 72.249.127.135






Cronbach Alpha and Related Statistics
ItemsCronbach AlphaStd. AlphaG6(smc)Average R
All itmes0.86330.86620.83030.6181
Q1_4 excluded0.8230.82620.76080.6131
Q1_15 excluded0.81980.82580.76120.6125
Q1_17 excluded0.84120.84270.78130.641
Q1_18 excluded0.81610.82180.75620.6059

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.8633 & 0.8662 & 0.8303 & 0.6181 \tabularnewline
Q1_4 excluded & 0.823 & 0.8262 & 0.7608 & 0.6131 \tabularnewline
Q1_15 excluded & 0.8198 & 0.8258 & 0.7612 & 0.6125 \tabularnewline
Q1_17 excluded & 0.8412 & 0.8427 & 0.7813 & 0.641 \tabularnewline
Q1_18 excluded & 0.8161 & 0.8218 & 0.7562 & 0.6059 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=87738&T=1

[TABLE]
[ROW][C]Cronbach Alpha and Related Statistics[/C][/ROW]
[ROW][C]Items[/C][C]Cronbach Alpha[/C][C]Std. Alpha[/C][C]G6(smc)[/C][C]Average R[/C][/ROW]
[ROW][C]All itmes[/C][C]0.8633[/C][C]0.8662[/C][C]0.8303[/C][C]0.6181[/C][/ROW]
[ROW][C]Q1_4 excluded[/C][C]0.823[/C][C]0.8262[/C][C]0.7608[/C][C]0.6131[/C][/ROW]
[ROW][C]Q1_15 excluded[/C][C]0.8198[/C][C]0.8258[/C][C]0.7612[/C][C]0.6125[/C][/ROW]
[ROW][C]Q1_17 excluded[/C][C]0.8412[/C][C]0.8427[/C][C]0.7813[/C][C]0.641[/C][/ROW]
[ROW][C]Q1_18 excluded[/C][C]0.8161[/C][C]0.8218[/C][C]0.7562[/C][C]0.6059[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=87738&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=87738&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:

Cronbach Alpha and Related Statistics
ItemsCronbach AlphaStd. AlphaG6(smc)Average R
All itmes0.86330.86620.83030.6181
Q1_4 excluded0.8230.82620.76080.6131
Q1_15 excluded0.81980.82580.76120.6125
Q1_17 excluded0.84120.84270.78130.641
Q1_18 excluded0.81610.82180.75620.6059


Figures (Output of Computation)

Input Parameters & R Code

Parameters (Session):
Parameters (R input):
R code (references can be found in the software module):
library(psych)
z <- t(y)
(r <- alpha(z))
load(file='createtable')
a<-table.start()
a<-table.row.start(a)
a<-table.element(a,'Cronbach Alpha and Related Statistics',5,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'Items',1,TRUE)
a<-table.element(a,'Cronbach Alpha',1,TRUE)
a<-table.element(a,'Std. Alpha',1,TRUE)
a<-table.element(a,'G6(smc)',1,TRUE)
a<-table.element(a,'Average R',1,TRUE)
a<-table.row.end(a)
a<-table.row.start(a)
a<-table.element(a,'All itmes',header=TRUE)
a<-table.element(a,round(r$total['raw_alpha'],4))
a<-table.element(a,round(r$total['std.alpha'],4))
a<-table.element(a,round(r$total['G6(smc)'],4))
a<-table.element(a,round(r$total['average_r'],4))
a<-table.row.end(a)
n = length(z[1,])
for (i in 1:n) {
a<-table.row.start(a)
a<-table.element(a,paste(colnames(z)[i],' excluded',sep=''),header=TRUE)
a<-table.element(a,round(r$alpha.drop[i,'raw_alpha'],4))
a<-table.element(a,round(r$alpha.drop[i,'std.alpha'],4))
a<-table.element(a,round(r$alpha.drop[i,'G6(smc)'],4))
a<-table.element(a,round(r$alpha.drop[i,'average_r'],4))
a<-table.row.end(a)
}
a<-table.end(a)
table.save(a,file='mytable.tab')