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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 computationMon, 24 Oct 2011 04:22:37 -0400
Cite this page as followsStatistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?v=date/2011/Oct/24/t1319444582swthqidxc35039d.htm/, Retrieved Thu, 12 Feb 2026 08:05:26 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=134302, Retrieved Thu, 12 Feb 2026 08:05:26 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact387

Tree of Dependent Computations

Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)
-     [Cronbach Alpha] [workshop 3 task 2] [2011-10-18 19:00:32] [a9dc51245fb8ca00f931d89893d090c8]
- R  D  [Cronbach Alpha] [workshop 3 task 2] [2011-10-18 19:11:48] [a9dc51245fb8ca00f931d89893d090c8]
-           [Cronbach Alpha] [WS3: vraag 2 (c)] [2011-10-24 08:22:37] [72fe11dce58fb9378ba9c20e1d437988] [Current]
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Dataset

Dataseries X:
Download CSV
Histogram
Boxplots 
6	6	4	5
4	4	3	4
6	2	5	5
4	2	2	3
2	2	2	2
5	5	5	4
1	1	1	1
6	4	5	5
3	5	4	4
4	4	3	3
3	1	1	5
2	2	5	4
4	4	3	3
3	2	2	1
5	6	6	6
3	3	3	2
3	2	2	2
6	6	6	6
1	2	1	1
1	6	4	4
1	1	1	2
5	4	5	5
2	1	1	2
3	4	3	3
3	2	2	4
5	5	6	1
5	5	6	1
1	1	1	2
2	1	2	4
3	4	4	4
5	4	4	4
3	5	4	5
5	5	4	6
3	3	3	3
2	1	1	3
4	5	3	4
3	2	1	1
3	3	3	5
6	6	6	6
6	4	3	2
3	4	4	4
3	2	2	3
4	3	3	4
4	5	4	5
2	5	3	2
2	2	2	3
3	2	2	2
2	1	1	4
5	4	4	5
5	1	2	2
6	4	3	4
3	4	4	3
3	5	4	4
2	4	2	2
5	5	4	5
2	2	2	4
4	3	3	4
4	2	2	2
1	1	1	1
6	5	4	4
2	2	1	4
3	3	3	3
4	4	4	4
3	2	1	5
4	5	4	5
3	2	1	5
6	6	6	6
4	5	4	4
5	4	4	5
3	2	2	2
4	4	5	6
3	5	5	5
3	4	3	2
6	6	5	6
6	6	5	5
2	4	4	4
2	4	4	4
6	3	3	4
5	6	5	7
1	2	3	1
2	2	4	2
5	2	2	3
3	3	3	3
3	2	3	4
4	4	5	4
6	5	5	5
4	4	4	4
2	3	3	3
4	4	4	2
4	3	3	3
2	2	2	3
4	5	5	5
3	3	3	4
6	5	4	4
4	3	3	3
4	3	3	3
3	4	2	4
3	3	4	4
3	3	3	3
4	6	6	6
2	3	3	3
2	1	1	1
3	5	5	5
3	6	5	5
4	4	3	3
4	4	3	4
2	5	3	2
5	4	4	6
5	4	1	5
4	3	5	5
4	1	2	1
3	2	3	2
4	3	2	3
4	2	3	3
5	5	5	5
4	2	3	3
5	2	2	3
3	4	3	4
2	2	1	1
1	3	3	3
5	4	5	4
5	3	4	6
3	1	1	2
4	5	4	5
4	1	1	3
5	4	4	4
5	5	6	6
3	3	3	2
4	4	3	4
6	3	3	5
4	3	4	4
5	6	6	5
4	2	1	2
4	4	2	3
5	5	4	6
4	4	3	3
3	4	2	5
3	3	2	4
6	4	5	5
5	5	5	5
2	3	2	1
4	5	4	4
3	2	2	2
3	6	4	5
5	6	4	7
3	2	2	3
3	3	3	4
4	4	3	4
5	4	4	5
5	4	5	4
5	4	2	1
5	3	2	2
3	7	5	5
4	4	2	2
4	4	4	4
3	4	4	5
4	4	4	6
4	4	4	4
3	3	3	4
2	5	4	6
4	3	2	4
4	5	4	4

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'Herman Ole Andreas Wold' @ wold.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 & 0 seconds \tabularnewline
R Server & 'Herman Ole Andreas Wold' @ wold.wessa.net \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=134302&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]'Herman Ole Andreas Wold' @ wold.wessa.net[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=134302&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=134302&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'Herman Ole Andreas Wold' @ wold.wessa.net






Cronbach Alpha and Related Statistics
ItemsCronbach AlphaStd. AlphaG6(smc)Average R
All itmes0.84140.84070.8160.5688
Q5 excluded0.84860.84940.80530.6528
Q12 excluded0.76840.76840.69440.5252
Q19 excluded0.75640.75560.67930.5075
Q26 excluded0.81330.81170.77440.5897

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.8414 & 0.8407 & 0.816 & 0.5688 \tabularnewline
Q5 excluded & 0.8486 & 0.8494 & 0.8053 & 0.6528 \tabularnewline
Q12 excluded & 0.7684 & 0.7684 & 0.6944 & 0.5252 \tabularnewline
Q19 excluded & 0.7564 & 0.7556 & 0.6793 & 0.5075 \tabularnewline
Q26 excluded & 0.8133 & 0.8117 & 0.7744 & 0.5897 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=134302&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]0.8414[/C][C]0.8407[/C][C]0.816[/C][C]0.5688[/C][/ROW]
[ROW][C]Q5 excluded[/C][C]0.8486[/C][C]0.8494[/C][C]0.8053[/C][C]0.6528[/C][/ROW]
[ROW][C]Q12 excluded[/C][C]0.7684[/C][C]0.7684[/C][C]0.6944[/C][C]0.5252[/C][/ROW]
[ROW][C]Q19 excluded[/C][C]0.7564[/C][C]0.7556[/C][C]0.6793[/C][C]0.5075[/C][/ROW]
[ROW][C]Q26 excluded[/C][C]0.8133[/C][C]0.8117[/C][C]0.7744[/C][C]0.5897[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=134302&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=134302&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 itmes0.84140.84070.8160.5688
Q5 excluded0.84860.84940.80530.6528
Q12 excluded0.76840.76840.69440.5252
Q19 excluded0.75640.75560.67930.5075
Q26 excluded0.81330.81170.77440.5897


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')