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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 computationTue, 16 Dec 2014 13:17:16 +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/2014/Dec/16/t1418735875yj0qsbedw815ycd.htm/, Retrieved Mon, 18 May 2026 17:30:14 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=269499, Retrieved Mon, 18 May 2026 17:30:14 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact284

Tree of Dependent Computations

Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)
-       [Cronbach Alpha] [Doubting of actio...] [2014-12-16 13:17:16] [ecc8a223a6799628ce1dc096d32923a0] [Current]
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Dataset

Dataseries X:
Download CSV
Histogram
Boxplots 
4 1 2 1 1 2
4 2 4 2 4 4
3 3 4 3 4 4
4 2 4 5 2 3
2 2 5 4 3 4
4 2 3 3 3 3
4 4 2 2 4 2
4 3 4 4 4 4
2 2 3 2 3 2
3 2 4 2 4 4
2 2 4 4 5 5
4 1 2 2 2 2
4 2 4 2 2 3
4 2 2 2 2 3
4 3 4 4 3 2
4 2 4 2 4 4
4 3 4 2 2 4
4 4 4 3 2 2
4 2 3 3 3 3
4 3 4 2 3 3
5 3 3 2 3 4
4 1 5 4 2 3
4 2 4 2 4 4
4 3 2 4 5 3
4 3 4 2 3 3
4 3 5 4 3 3
4 2 4 3 2 2
4 2 4 2 4 4
4 2 3 3 2 2
4 1 2 1 2 2
2 2 4 2 2 3
5 1 1 1 1 1
2 2 3 2 3 2
5 2 2 2 2 2
5 2 4 2 2 2
2 2 4 2 2 4
4 2 2 2 2 2
2 3 3 2 2 2
4 2 4 4 4 3
5 4 2 4 2 3
3 1 2 2 2 1
4 2 4 2 4 4
5 4 1 2 2 3
2 2 2 1 1 1
4 2 3 2 4 4
5 3 2 2 2 3
4 2 4 2 2 2
3 2 3 2 4 4
5 5 4 5 2 2
3 2 4 4 4 5
2 2 2 2 2 2
4 3 3 3 4 3
2 1 3 2 2 2
4 2 4 2 2 4
5 2 3 1 1 2
4 4 5 4 2 4
4 2 4 2 2 2
4 2 4 5 4 4
2 2 2 2 2 2
4 2 2 3 3 4
4 4 2 2 2 2
4 2 4 3 3 5
5 3 4 4 3 4
2 1 2 2 3 2
3 3 3 4 3 3
3 1 2 3 2 2
4 3 4 3 4 4
4 3 4 5 4 3
3 2 3 2 1 2
3 1 2 2 1 1
4 3 4 4 4 2
4 3 4 1 4 2
3 2 2 3 2 2
4 2 2 4 4 4
4 1 4 4 3 4
4 2 3 2 4 3
5 2 4 4 3 4
4 3 3 3 3 2
2 2 4 2 3 2
3 1 4 3 3 4
4 1 1 1 2 2
4 2 3 3 3 3
3 1 2 2 2 2
5 4 2 2 2 2
3 1 2 1 3 2
4 4 3 4 3 3
4 2 3 2 2 3
4 1 2 1 2 2
4 2 4 4 2 4
2 2 2 2 3 3
3 3 3 4 4 4
3 2 3 2 2 2
4 2 4 5 4 4
4 2 3 2 3 2
3 1 2 2 2 3
3 2 2 2 2 2
3 2 3 2 2 2
4 1 4 2 4 4
4 2 4 4 2 2
4 2 5 4 2 2
4 3 4 3 2 5
4 3 2 2 2 2
3 2 4 2 2 2
3 2 4 2 4 3
4 2 2 2 4 4
4 4 3 2 2 2
3 3 3 3 3 5
4 3 2 2 3 3
4 1 2 3 3 4
5 3 2 3 3 2
4 4 4 5 1 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'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=269499&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=269499&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=269499&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 itmes0.66370.65240.67560.2383
PERF6 excluded0.69330.68660.68450.3047
PERF14 excluded0.65190.63690.64610.2597
PERF17 excluded0.60230.59290.60950.2256
PERF28 excluded0.56240.55080.57810.197
PERF32 excluded0.61660.60640.60330.2356
PERF33 excluded0.5770.56640.55960.2072

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.6637 & 0.6524 & 0.6756 & 0.2383 \tabularnewline
PERF6 excluded & 0.6933 & 0.6866 & 0.6845 & 0.3047 \tabularnewline
PERF14 excluded & 0.6519 & 0.6369 & 0.6461 & 0.2597 \tabularnewline
PERF17 excluded & 0.6023 & 0.5929 & 0.6095 & 0.2256 \tabularnewline
PERF28 excluded & 0.5624 & 0.5508 & 0.5781 & 0.197 \tabularnewline
PERF32 excluded & 0.6166 & 0.6064 & 0.6033 & 0.2356 \tabularnewline
PERF33 excluded & 0.577 & 0.5664 & 0.5596 & 0.2072 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=269499&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]0.6637[/C][C]0.6524[/C][C]0.6756[/C][C]0.2383[/C][/ROW]
[ROW][C]PERF6 excluded[/C][C]0.6933[/C][C]0.6866[/C][C]0.6845[/C][C]0.3047[/C][/ROW]
[ROW][C]PERF14 excluded[/C][C]0.6519[/C][C]0.6369[/C][C]0.6461[/C][C]0.2597[/C][/ROW]
[ROW][C]PERF17 excluded[/C][C]0.6023[/C][C]0.5929[/C][C]0.6095[/C][C]0.2256[/C][/ROW]
[ROW][C]PERF28 excluded[/C][C]0.5624[/C][C]0.5508[/C][C]0.5781[/C][C]0.197[/C][/ROW]
[ROW][C]PERF32 excluded[/C][C]0.6166[/C][C]0.6064[/C][C]0.6033[/C][C]0.2356[/C][/ROW]
[ROW][C]PERF33 excluded[/C][C]0.577[/C][C]0.5664[/C][C]0.5596[/C][C]0.2072[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=269499&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=269499&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 itmes0.66370.65240.67560.2383
PERF6 excluded0.69330.68660.68450.3047
PERF14 excluded0.65190.63690.64610.2597
PERF17 excluded0.60230.59290.60950.2256
PERF28 excluded0.56240.55080.57810.197
PERF32 excluded0.61660.60640.60330.2356
PERF33 excluded0.5770.56640.55960.2072


Figures (Output of Computation)

Input Parameters & R Code

Parameters (Session):
par1 = TRUE ;
Parameters (R input):
par1 = TRUE ;
R code (references can be found in the software module):
library(psych)
par1b <- T
if(par1=='FALSE') par1b <- F
z <- t(y)
(r <- alpha(z,check.keys=par1b))
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')