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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 computationFri, 16 Dec 2016 22:11:36 +0100
Cite this page as followsStatistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?v=date/2016/Dec/16/t1481922771wzpkoi06kymcvcu.htm/, Retrieved Fri, 31 Oct 2025 23:40:46 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=300561, Retrieved Fri, 31 Oct 2025 23:40:46 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact195

Tree of Dependent Computations

Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)
-     [Histogram] [verdeling ITH3] [2016-12-16 20:10:08] [f1da1d1acf394d52c723b7458260b4e7]
- RM D    [Cronbach Alpha] [Cronbach Alpha TVDC] [2016-12-16 21:11:36] [6f830dc7e8de22be3233942ffbe3aaba] [Current]
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Dataset

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

Tables (Output of Computation)





Summary of computational transaction
Raw Input view raw input (R code)
Raw Outputview raw output of R engine
Computing time1 seconds
R ServerBig Analytics Cloud Computing Center

\begin{tabular}{lllllllll}
\hline
Summary of computational transaction \tabularnewline
Raw Input view raw input (R code)  \tabularnewline
Raw Outputview raw output of R engine  \tabularnewline
Computing time1 seconds \tabularnewline
R ServerBig Analytics Cloud Computing Center \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=300561&T=0

[TABLE]
[ROW]
Summary of computational transaction[/C][/ROW] [ROW]Raw Input[/C] view raw input (R code) [/C][/ROW] [ROW]Raw Output[/C]view raw output of R engine [/C][/ROW] [ROW]Computing time[/C]1 seconds[/C][/ROW] [ROW]R Server[/C]Big Analytics Cloud Computing Center[/C][/ROW] [/TABLE] Source: https://freestatistics.org/blog/index.php?pk=300561&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=300561&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 Input view raw input (R code)
Raw Outputview raw output of R engine
Computing time1 seconds
R ServerBig Analytics Cloud Computing Center






Cronbach Alpha and Related Statistics
ItemsCronbach AlphaStd. AlphaG6(smc)Average R
All itmes0.50070.52150.51460.2141
TVDC1 excluded0.44730.45230.38040.2159
TDVC2 excluded0.36880.35620.36820.1557
TDVC3 excluded0.25440.3190.28860.1351
TDVC4 excluded0.59170.61740.53780.3498

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.5007 & 0.5215 & 0.5146 & 0.2141 \tabularnewline
TVDC1 excluded & 0.4473 & 0.4523 & 0.3804 & 0.2159 \tabularnewline
TDVC2 excluded & 0.3688 & 0.3562 & 0.3682 & 0.1557 \tabularnewline
TDVC3 excluded & 0.2544 & 0.319 & 0.2886 & 0.1351 \tabularnewline
TDVC4 excluded & 0.5917 & 0.6174 & 0.5378 & 0.3498 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=300561&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]0.5007[/C][C]0.5215[/C][C]0.5146[/C][C]0.2141[/C][/ROW]
[ROW][C]TVDC1 excluded[/C][C]0.4473[/C][C]0.4523[/C][C]0.3804[/C][C]0.2159[/C][/ROW]
[ROW][C]TDVC2 excluded[/C][C]0.3688[/C][C]0.3562[/C][C]0.3682[/C][C]0.1557[/C][/ROW]
[ROW][C]TDVC3 excluded[/C][C]0.2544[/C][C]0.319[/C][C]0.2886[/C][C]0.1351[/C][/ROW]
[ROW][C]TDVC4 excluded[/C][C]0.5917[/C][C]0.6174[/C][C]0.5378[/C][C]0.3498[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=300561&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=300561&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 itmes0.50070.52150.51460.2141
TVDC1 excluded0.44730.45230.38040.2159
TDVC2 excluded0.36880.35620.36820.1557
TDVC3 excluded0.25440.3190.28860.1351
TDVC4 excluded0.59170.61740.53780.3498


Figures (Output of Computation)

Input Parameters & R Code

Parameters (Session):
par1 = 5 ; par2 = grey ; par3 = FALSE ; par4 = 5-point Likert ;
Parameters (R input):
par1 = 5 ;
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')