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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 15:03:24 +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/2014/Dec/16/t1418742250aocvg5d1t01jq9b.htm/, Retrieved Mon, 18 May 2026 16:36:14 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=269679, Retrieved Mon, 18 May 2026 16:36:14 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact370

Tree of Dependent Computations

Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)
-     [Cronbach Alpha] [CA ] [2014-12-12 10:49:45] [40df8d8b5657a9599acc6ccced535535]
-    D    [Cronbach Alpha] [CA] [2014-12-16 15:03:24] [eeaae55b7499419163eef5a1870a44a7] [Current]
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Dataset

Dataseries X:
Download CSV
Histogram
Boxplots 
0 1 1 1 1 0
1 1 1 1 1 1
0 1 1 1 1 1
1 1 1 1 1 1
1 1 0 1 1 1
0 1 1 1 0 1
0 0 0 0 0 0
0 1 1 1 1 1
1 1 0 0 0 1
0 1 1 1 1 1
1 0 0 0 1 0
1 1 0 1 0 0
0 0 1 1 1 1
1 1 1 1 1 1
1 1 0 0 0 1
1 0 1 1 1 0
0 0 0 0 0 1
1 1 1 1 1 0
0 1 0 1 1 1
1 1 1 0 0 1
0 1 1 1 1 0
1 1 0 0 0 1
1 1 1 1 1 1
1 1 1 1 1 0
0 1 1 1 1 1
1 1 1 1 1 1
0 1 1 1 1 0
1 1 1 1 1 1
0 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 0
0 1 1 0 1 1
0 1 1 1 1 0
1 1 1 1 1 1
1 1 1 1 1 1
0 1 1 1 1 0
1 1 1 1 1 1
1 1 1 1 1 1
1 1 0 0 0 1
0 0 1 1 1 1
0 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 0
0 1 1 1 1 1
1 0 1 0 0 1
1 1 1 1 1 0
1 0 0 0 0 0
1 1 1 1 1 0
1 1 1 1 1 1
1 1 1 1 1 1
0 1 0 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 1
0 1 1 1 1 1
1 0 0 0 0 1
0 0 1 1 0 0
1 1 1 1 1 1
1 1 1 1 1 1
0 1 1 1 1 1
1 1 1 1 1 1
0 1 1 1 1 1
0 1 1 1 1 0
1 1 1 1 1 0
0 1 0 1 1 1
0 1 1 1 1 1
1 0 1 1 1 0
1 1 1 1 1 1
0 1 1 1 1 1
0 1 1 1 1 0
0 1 1 1 1 1
1 1 1 1 1 0
1 1 1 1 1 1
1 0 1 1 1 0
1 1 1 1 1 1
1 0 0 0 0 1
0 1 1 1 1 1
1 1 1 1 1 1
1 1 1 1 1 0
1 1 1 1 1 0
1 1 0 0 0 1
0 1 1 0 1 0
1 1 1 1 1 0
1 1 1 1 1 1
1 0 0 0 1 0
1 1 1 1 1 1
0 1 1 1 1 0
1 1 1 1 1 0
1 1 1 1 1 1
1 0 1 1 1 1
1 1 1 1 1 0
1 1 1 1 1 1
1 1 1 1 1 0
1 1 1 1 1 1
1 1 1 1 1 0
1 1 1 0 1 0
0 1 1 1 1 1
1 1 1 0 1 1
0 1 1 1 1 1
0 1 1 1 1 1
0 1 1 1 1 0
1 1 1 1 1 0
0 0 0 0 0 0
1 1 1 0 1 1
1 1 1 1 1 1
0 0 0 0 1 0
0 0 0 1 0 0
0 1 1 1 0 0

Tables (Output of Computation)





Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time1 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 & 1 seconds \tabularnewline
R Server & 'Herman Ole Andreas Wold' @ wold.wessa.net \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=269679&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]1 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=269679&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=269679&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 time1 seconds
R Server'Herman Ole Andreas Wold' @ wold.wessa.net






Cronbach Alpha and Related Statistics
ItemsCronbach AlphaStd. AlphaG6(smc)Average R
All itmes0.60070.64650.67870.2336
GRAPQ10 excluded0.69330.7210.72690.3407
GRAPQ18.1 excluded0.49010.54830.59950.1953
GRAPQ18.2 excluded0.46670.51740.54840.1765
GRAPQ18.3 excluded0.49770.54550.56790.1936
GRAPQ18.4 excluded0.48080.52820.56030.1829
GRAPQ20 excluded0.65890.69450.70770.3125

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.6007 & 0.6465 & 0.6787 & 0.2336 \tabularnewline
GRAPQ10 excluded & 0.6933 & 0.721 & 0.7269 & 0.3407 \tabularnewline
GRAPQ18.1 excluded & 0.4901 & 0.5483 & 0.5995 & 0.1953 \tabularnewline
GRAPQ18.2 excluded & 0.4667 & 0.5174 & 0.5484 & 0.1765 \tabularnewline
GRAPQ18.3 excluded & 0.4977 & 0.5455 & 0.5679 & 0.1936 \tabularnewline
GRAPQ18.4 excluded & 0.4808 & 0.5282 & 0.5603 & 0.1829 \tabularnewline
GRAPQ20 excluded & 0.6589 & 0.6945 & 0.7077 & 0.3125 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=269679&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]0.6007[/C][C]0.6465[/C][C]0.6787[/C][C]0.2336[/C][/ROW]
[ROW][C]GRAPQ10 excluded[/C][C]0.6933[/C][C]0.721[/C][C]0.7269[/C][C]0.3407[/C][/ROW]
[ROW][C]GRAPQ18.1 excluded[/C][C]0.4901[/C][C]0.5483[/C][C]0.5995[/C][C]0.1953[/C][/ROW]
[ROW][C]GRAPQ18.2 excluded[/C][C]0.4667[/C][C]0.5174[/C][C]0.5484[/C][C]0.1765[/C][/ROW]
[ROW][C]GRAPQ18.3 excluded[/C][C]0.4977[/C][C]0.5455[/C][C]0.5679[/C][C]0.1936[/C][/ROW]
[ROW][C]GRAPQ18.4 excluded[/C][C]0.4808[/C][C]0.5282[/C][C]0.5603[/C][C]0.1829[/C][/ROW]
[ROW][C]GRAPQ20 excluded[/C][C]0.6589[/C][C]0.6945[/C][C]0.7077[/C][C]0.3125[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=269679&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=269679&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 itmes0.60070.64650.67870.2336
GRAPQ10 excluded0.69330.7210.72690.3407
GRAPQ18.1 excluded0.49010.54830.59950.1953
GRAPQ18.2 excluded0.46670.51740.54840.1765
GRAPQ18.3 excluded0.49770.54550.56790.1936
GRAPQ18.4 excluded0.48080.52820.56030.1829
GRAPQ20 excluded0.65890.69450.70770.3125


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')