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Description of Statistical Computation

Author's title

Author*Unverified author*
R Software Modulerwasp_cronbach.wasp
Title produced by softwareCronbach Alpha
Date of computationMon, 15 Nov 2010 21:27:57 +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/Nov/15/t1289856362og3vr28wfjyo6vz.htm/, Retrieved Sat, 07 Feb 2026 04:51:46 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=95091, Retrieved Sat, 07 Feb 2026 04:51:46 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact365

Tree of Dependent Computations

Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)
-     [Cronbach Alpha] [Intrinsic Motivat...] [2010-10-12 11:40:37] [b98453cac15ba1066b407e146608df68]
-    D  [Cronbach Alpha] [Chronbach Alpha p...] [2010-11-15 21:01:02] [97ad38b1c3b35a5feca8b85f7bc7b3ff]
-    D    [Cronbach Alpha] [Chronbach alpha p...] [2010-11-15 21:07:03] [97ad38b1c3b35a5feca8b85f7bc7b3ff]
-    D      [Cronbach Alpha] [Chronbach Alpha p...] [2010-11-15 21:09:15] [97ad38b1c3b35a5feca8b85f7bc7b3ff]
-    D        [Cronbach Alpha] [Chronbach Alpha f...] [2010-11-15 21:24:10] [97ad38b1c3b35a5feca8b85f7bc7b3ff]
-    D          [Cronbach Alpha] [Chronbach Alpha k...] [2010-11-15 21:26:11] [97ad38b1c3b35a5feca8b85f7bc7b3ff]
-    D              [Cronbach Alpha] [Chronbach Alpha] [2010-11-15 21:27:57] [d41d8cd98f00b204e9800998ecf8427e] [Current]
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Dataset

Dataseries X:
Download CSV
Histogram
Boxplots 
4	3	3	3
3	3	4	3
4	4	4	4
3	3	3	3
3	3	2	3
4	3	2	3
4	4	5	5
3	2	3	3
4	4	2	4
3	2	2	2
4	3	4	3
3	3	3	3
4	4	3	0
3	3	4	2
3	3	4	3
4	3	2	2
3	3	3	3
4	4	4	4
3	2	2	2
3	3	2	3
4	3	3	3
4	4	4	3
3	3	2	2
3	3	2	3
4	3	3	3
4	4	4	4
4	4	4	3
4	4	3	3
4	4	3	3
4	4	4	2
2	2	2	2
4	3	3	3
4	4	4	3
4	3	3	3
3	3	2	3
4	4	4	3
4	3	4	4
3	2	2	2
4	3	3	3
4	4	4	4
3	3	4	3
4	2	3	2
3	2	4	3
3	3	3	3
3	3	3	3
3	4	3	4
4	4	3	3
2	2	2	2
3	3	4	3
4	4	4	4
3	3	4	3
3	3	2	3
4	4	3	3
3	3	3	4
4	3	3	3
4	3	3	3
4	3	2	3
5	4	4	3
4	3	4	4
4	4	4	3
3	3	3	3
3	4	4	3
3	3	3	3
4	4	4	3
3	3	3	3
4	3	3	3
3	3	3	3
3	3	3	3
3	3	4	3
1	2	1	1
4	3	4	2
4	3	4	2
4	4	3	3
4	4	5	4
4	3	3	3
4	3	3	3
3	3	3	3
3	3	4	3
3	4	4	3
3	2	3	3
4	3	3	2
3	3	3	3
4	4	4	4
4	3	2	3
2	3	4	3
3	3	3	3
3	3	2	2
4	4	4	3
4	4	4	3
4	3	3	2
4	4	4	4
4	4	4	3
4	4	4	4
4	3	3	3
3	3	3	3
3	2	4	2
2	3	5	3
2	3	3	2
4	4	4	3
3	3	4	3
4	4	4	4
4	3	4	4
5	3	5	5
3	3	4	3
1	3	3	3
4	4	4	4
3	3	4	3
4	4	4	3
4	3	4	3
4	3	4	4
4	3	4	3
4	3	3	3
3	3	4	3
4	3	4	4
4	4	4	4
3	3	4	4
3	3	4	4
4	4	4	4
4	3	4	3
3	3	3	3
3	3	4	3
3	3	3	3
4	3	3	2
4	3	4	3
3	4	4	3
3	3	4	4
4	4	4	4
4	3	3	3
4	4	3	3
1	1	1	1
4	4	4	4
4	3	3	3
4	4	4	4
4	4	4	3
4	4	3	3
4	3	4	2
4	3	4	3
4	3	2	3
4	4	4	3
4	3	3	4
4	3	3	3
4	3	4	3
4	4	4	4
0	2	2	2
4	3	3	3
4	3	3	3
4	3	3	4
4	3	5	3
4	3	4	3
4	4	4	3
4	3	3	3
5	4	4	3
3	3	3	3
4	4	4	3
3	3	4	2
3	3	4	NA

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=95091&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=95091&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=95091&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 itmes0.76090.76790.72250.4527
Q1_5 excluded0.72240.72810.64140.4717
Q1_10 excluded0.67230.67350.58320.4075
Q1_12 excluded0.71140.71860.64040.4598
Q1_13 excluded0.71470.72820.65230.4718

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.7609 & 0.7679 & 0.7225 & 0.4527 \tabularnewline
Q1_5 excluded & 0.7224 & 0.7281 & 0.6414 & 0.4717 \tabularnewline
Q1_10 excluded & 0.6723 & 0.6735 & 0.5832 & 0.4075 \tabularnewline
Q1_12 excluded & 0.7114 & 0.7186 & 0.6404 & 0.4598 \tabularnewline
Q1_13 excluded & 0.7147 & 0.7282 & 0.6523 & 0.4718 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=95091&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]0.7609[/C][C]0.7679[/C][C]0.7225[/C][C]0.4527[/C][/ROW]
[ROW][C]Q1_5 excluded[/C][C]0.7224[/C][C]0.7281[/C][C]0.6414[/C][C]0.4717[/C][/ROW]
[ROW][C]Q1_10 excluded[/C][C]0.6723[/C][C]0.6735[/C][C]0.5832[/C][C]0.4075[/C][/ROW]
[ROW][C]Q1_12 excluded[/C][C]0.7114[/C][C]0.7186[/C][C]0.6404[/C][C]0.4598[/C][/ROW]
[ROW][C]Q1_13 excluded[/C][C]0.7147[/C][C]0.7282[/C][C]0.6523[/C][C]0.4718[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=95091&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=95091&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 itmes0.76090.76790.72250.4527
Q1_5 excluded0.72240.72810.64140.4717
Q1_10 excluded0.67230.67350.58320.4075
Q1_12 excluded0.71140.71860.64040.4598
Q1_13 excluded0.71470.72820.65230.4718


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')