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Author's title

Author

*The author of this computation has been verified*

R Software Module

rwasp_cronbach.wasp

Title produced by software

Cronbach Alpha

Date of computation

Sat, 11 Dec 2010 09:58:14 +0000

Cite this page as follows

Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?v=date/2010/Dec/11/t1292061400basju627vov42zr.htm/, Retrieved Fri, 29 May 2026 17:01:42 +0000

Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=108033, Retrieved Fri, 29 May 2026 17:01:42 +0000

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Original text written by user:

IsPrivate?

No (this computation is public)

User-defined keywords

Estimated Impact

363

Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)

-       [Cronbach Alpha] [interne consisten...] [2010-12-11 09:58:14] [7b4029fa8534fd52dfa7d68267386cff] [Current]

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Dataseries X:

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Histogram

Boxplots

5	4	5	4	4	4
4	4	4	4	3	4
4	4	5	4	3	5
4	4	4	4	3	4
2	4	3	4	4	2
5	5	5	5	4	5
5	4	4	4	4	4
4	3	4	3	3	4
3	4	4	4	4	3
4	4	4	5	4	4
4	4	4	4	4	4
NA	4	4	4	4	2
3	4	4	4	4	3
3	2	3	2	2	3
4	3	4	4	3	4
5	4	5	5	4	5
4	3	4	2	3	4
2	2	2	2	2	2
4	4	4	4	4	4
4	3	4	2	3	4
4	3	4	3	3	4
4	4	4	4	2	2
4	3	4	3	3	4
4	3	4	4	4	4
5	4	5	5	4	5
4	4	4	4	4	4
4	4	4	4	4	4
4	4	4	4	4	4
4	4	4	4	3	4
4	4	4	4	3	4
4	5	5	5	5	5
4	4	4	4	4	4
2	4	2	4	4	2
4	4	5	4	4	4
4	3	4	3	3	4
5	4	5	4	4	4
5	3	4	3	3	4
4	4	4	3	3	4
3	4	4	4	4	3
4	3	4	4	4	4
5	5	5	5	5	5
4	4	4	4	3	4
4	3	4	2	2	2
5	3	5	3	3	4
4	3	4	4	4	4
5	4	4	4	4	4
4	4	4	4	4	4
4	4	4	4	4	4
4	4	4	4	3	4
3	4	4	4	4	2
4	4	4	4	4	4
4	4	4	4	4	4
4	5	5	4	5	5
2	3	3	3	2	3
3	3	4	4	3	3
5	5	5	5	5	4
4	5	5	4	5	4
4	4	4	4	2	4
5	4	5	5	4	5
3	3	2	3	2	3
5	4	4	4	4	4
4	4	4	4	4	4
5	5	4	5	4	5
4	4	4	4	4	4
4	4	4	4	3	4
5	5	5	5	5	5
4	4	4	4	4	4
4	3	4	4	2	4
5	4	4	4	4	4
4	4	4	4	4	5
3	4	3	4	4	4
4	4	4	4	3	4
5	4	5	4	4	4
5	4	5	2	3	4
5	4	4	4	4	4
4	3	4	4	3	3
4	4	5	4	4	4
5	3	4	4	4	4
5	5	5	4	5	5
4	4	3	4	4	3
5	5	4	5	4	4
3	5	4	5	5	4
4	4	4	4	3	3
4	4	4	4	4	4
4	4	5	5	5	4
4	4	4	4	4	4
4	4	4	4	4	4
5	5	5	5	4	5
4	4	3	3	4	4
4	3	4	3	3	4
4	4	4	4	4	4
5	3	5	3	3	5
3	4	4	4	4	4
3	4	3	4	3	3
5	4	5	4	4	5
5	4	5	4	4	4
4	4	5	4	4	4
4	3	4	3	3	4
4	3	4	3	3	4
4	3	4	2	3	3
4	3	4	3	3	4
4	3	4	3	3	4
4	2	2	2	4	2
4	3	4	3	4	4
5	5	5	5	4	5
2	2	2	4	3	2
4	2	3	3	2	3
2	3	2	3	3	2
4	3	4	4	3	3
5	NA	4	4	4	4
3	4	3	4	3	2
4	4	4	4	4	4
3	3	4	4	4	2
4	2	3	3	2	3
4	3	5	3	3	5
4	4	4	4	4	4
2	2	2	4	2	2
1	4	3	4	3	4
4	4	4	4	4	4
3	2	2	2	2	2
4	3	4	4	4	3
3	3	3	2	2	3
3	3	4	3	3	3
5	4	4	4	4	4
4	4	4	5	4	4
3	4	4	4	4	4
4	3	5	4	4	4
4	4	5	4	4	5
4	4	5	4	4	5
4	4	5	4	4	4
3	2	4	4	2	3
4	4	4	4	2	3
4	5	5	4	4	4
4	4	4	4	3	4
4	4	4	4	4	3
4	4	4	4	2	4
3	3	4	4	3	3
4	1	2	2	2	2
4	4	4	4	4	4
2	3	2	3	3	2
2	3	3	2	2	2
4	3	4	3	4	4
2	1	1	3	2	1
4	4	4	4	4	4
3	5	3	3	4	4
4	4	4	4	4	4
3	3	4	3	3	3
2	4	4	4	3	3
2	3	1	3	3	1
4	4	2	4	4	2
3	4	4	4	3	4
4	4	4	4	4	4
4	5	5	5	5	5
2	2	2	2	2	2
5	3	2	4	3	3
4	3	4	3	3	4
4	4	4	4	4	4
4	4	4	4	3	3
3	3	4	4	3	3

Summary of computational transaction
Raw Input	view raw input (R code)
Raw Output	view raw output of R engine
Computing time	2 seconds
R Server	'Gwilym Jenkins' @ 72.249.127.135

\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 & 2 seconds \tabularnewline
R Server & 'Gwilym Jenkins' @ 72.249.127.135 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=108033&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]2 seconds[/C][/ROW]
[ROW][C]R Server[/C][C]'Gwilym Jenkins' @ 72.249.127.135[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=108033&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=108033&T=0

As an alternative you can also use a 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 Output	view raw output of R engine
Computing time	2 seconds
R Server	'Gwilym Jenkins' @ 72.249.127.135

Cronbach Alpha and Related Statistics
Items	Cronbach Alpha	Std. Alpha	G6(smc)	Average R
All itmes	0.8798	0.8797	0.8893	0.5492
Q1_2 excluded	0.8737	0.8748	0.8763	0.5828
Q1_7 excluded	0.8522	0.8504	0.8502	0.532
Q1_8 excluded	0.847	0.8486	0.8515	0.5285
Q1_27 excluded	0.8698	0.869	0.8711	0.5702
Q1_29 excluded	0.8622	0.8608	0.8675	0.5529
Q1_31 excluded	0.8476	0.8489	0.8502	0.5292

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.8798 & 0.8797 & 0.8893 & 0.5492 \tabularnewline
Q1_2 excluded & 0.8737 & 0.8748 & 0.8763 & 0.5828 \tabularnewline
Q1_7 excluded & 0.8522 & 0.8504 & 0.8502 & 0.532 \tabularnewline
Q1_8 excluded & 0.847 & 0.8486 & 0.8515 & 0.5285 \tabularnewline
Q1_27 excluded & 0.8698 & 0.869 & 0.8711 & 0.5702 \tabularnewline
Q1_29 excluded & 0.8622 & 0.8608 & 0.8675 & 0.5529 \tabularnewline
Q1_31 excluded & 0.8476 & 0.8489 & 0.8502 & 0.5292 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=108033&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]0.8798[/C][C]0.8797[/C][C]0.8893[/C][C]0.5492[/C][/ROW]
[ROW][C]Q1_2 excluded[/C][C]0.8737[/C][C]0.8748[/C][C]0.8763[/C][C]0.5828[/C][/ROW]
[ROW][C]Q1_7 excluded[/C][C]0.8522[/C][C]0.8504[/C][C]0.8502[/C][C]0.532[/C][/ROW]
[ROW][C]Q1_8 excluded[/C][C]0.847[/C][C]0.8486[/C][C]0.8515[/C][C]0.5285[/C][/ROW]
[ROW][C]Q1_27 excluded[/C][C]0.8698[/C][C]0.869[/C][C]0.8711[/C][C]0.5702[/C][/ROW]
[ROW][C]Q1_29 excluded[/C][C]0.8622[/C][C]0.8608[/C][C]0.8675[/C][C]0.5529[/C][/ROW]
[ROW][C]Q1_31 excluded[/C][C]0.8476[/C][C]0.8489[/C][C]0.8502[/C][C]0.5292[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=108033&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=108033&T=1

As an alternative you can also use a QR Code:

The GUIDs for individual cells are displayed in the table below:

Cronbach Alpha and Related Statistics
Items	Cronbach Alpha	Std. Alpha	G6(smc)	Average R
All itmes	0.8798	0.8797	0.8893	0.5492
Q1_2 excluded	0.8737	0.8748	0.8763	0.5828
Q1_7 excluded	0.8522	0.8504	0.8502	0.532
Q1_8 excluded	0.847	0.8486	0.8515	0.5285
Q1_27 excluded	0.8698	0.869	0.8711	0.5702
Q1_29 excluded	0.8622	0.8608	0.8675	0.5529
Q1_31 excluded	0.8476	0.8489	0.8502	0.5292

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')

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Dataset

Tables (Output of Computation)

Figures (Output of Computation)

Input Parameters & R Code