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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 computationSat, 13 Dec 2014 16:32:19 +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/13/t1418488352u1m3f13fiquw95l.htm/, Retrieved Tue, 04 Nov 2025 18:18:29 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=267218, Retrieved Tue, 04 Nov 2025 18:18:29 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact259

Tree of Dependent Computations

Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)
-     [Cronbach Alpha] [Im1 cronbach pape...] [2014-12-13 16:27:20] [2a42404c3b0fbfc7622e3301a77a3a9b]
- R  D    [Cronbach Alpha] [i3 2011] [2014-12-13 16:32:19] [7f321f4960a2eb51b416148f42b4b920] [Current]
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Dataset

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

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'George Udny Yule' @ yule.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 & 'George Udny Yule' @ yule.wessa.net \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=267218&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]'George Udny Yule' @ yule.wessa.net[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=267218&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=267218&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'George Udny Yule' @ yule.wessa.net






Cronbach Alpha and Related Statistics
ItemsCronbach AlphaStd. AlphaG6(smc)Average R
All itmes0.82680.82790.80370.546
AMS4 excluded0.86070.86210.81250.6757
AMS11 excluded0.74290.74340.68370.4912
AMS18 excluded0.72880.72970.66540.4736
AMS25 excluded0.780.78120.74130.5434

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.8268 & 0.8279 & 0.8037 & 0.546 \tabularnewline
AMS4 excluded & 0.8607 & 0.8621 & 0.8125 & 0.6757 \tabularnewline
AMS11 excluded & 0.7429 & 0.7434 & 0.6837 & 0.4912 \tabularnewline
AMS18 excluded & 0.7288 & 0.7297 & 0.6654 & 0.4736 \tabularnewline
AMS25 excluded & 0.78 & 0.7812 & 0.7413 & 0.5434 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=267218&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]0.8268[/C][C]0.8279[/C][C]0.8037[/C][C]0.546[/C][/ROW]
[ROW][C]AMS4 excluded[/C][C]0.8607[/C][C]0.8621[/C][C]0.8125[/C][C]0.6757[/C][/ROW]
[ROW][C]AMS11 excluded[/C][C]0.7429[/C][C]0.7434[/C][C]0.6837[/C][C]0.4912[/C][/ROW]
[ROW][C]AMS18 excluded[/C][C]0.7288[/C][C]0.7297[/C][C]0.6654[/C][C]0.4736[/C][/ROW]
[ROW][C]AMS25 excluded[/C][C]0.78[/C][C]0.7812[/C][C]0.7413[/C][C]0.5434[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=267218&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=267218&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 itmes0.82680.82790.80370.546
AMS4 excluded0.86070.86210.81250.6757
AMS11 excluded0.74290.74340.68370.4912
AMS18 excluded0.72880.72970.66540.4736
AMS25 excluded0.780.78120.74130.5434


Figures (Output of Computation)

Input Parameters & R Code

Parameters (Session):
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')