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Author's title

Author

*Unverified author*

R Software Module

rwasp_cronbach.wasp

Title produced by software

Cronbach Alpha

Date of computation

Thu, 16 Dec 2010 16:38:21 +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/16/t129251737475ylwz2jf3hzycv.htm/, Retrieved Tue, 26 May 2026 06:55:05 +0000

Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=111087, Retrieved Tue, 26 May 2026 06:55:05 +0000

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Original text written by user:

IsPrivate?

No (this computation is public)

User-defined keywords

Estimated Impact

516

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

-     [Percentiles] [Intrinsic Motivat...] [2010-10-12 12:10:58] [b98453cac15ba1066b407e146608df68]
- RM D  [Tukey lambda PPCC Plot] [Tukey-lambda: Int...] [2010-10-15 17:01:05] [6bc4f9343b7ea3ef5a59412d1f72bb2b]
- RM D    [Cronbach Alpha] [Cronbach Alpha - ...] [2010-12-12 15:33:24] [3cdf9c5e1f396891d2638627ccb7b98d]
-    D        [Cronbach Alpha] [Cronbach Alpha - ...] [2010-12-16 16:38:21] [d41d8cd98f00b204e9800998ecf8427e] [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	1 seconds
R Server	'RServer@AstonUniversity' @ vre.aston.ac.uk

\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 & 'RServer@AstonUniversity' @ vre.aston.ac.uk \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=111087&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]'RServer@AstonUniversity' @ vre.aston.ac.uk[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=111087&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=111087&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	1 seconds
R Server	'RServer@AstonUniversity' @ vre.aston.ac.uk

Cronbach Alpha and Related Statistics
Items	Cronbach Alpha	Std. Alpha	G6(smc)	Average R
All itmes	0.8798	0.8797	0.8893	0.5492
Q2 excluded	0.8737	0.8748	0.8763	0.5828
Q7 excluded	0.8522	0.8504	0.8502	0.532
Q8 excluded	0.847	0.8486	0.8515	0.5285
Q27 excluded	0.8698	0.869	0.8711	0.5702
Q29 excluded	0.8622	0.8608	0.8675	0.5529
Q31 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
Q2 excluded & 0.8737 & 0.8748 & 0.8763 & 0.5828 \tabularnewline
Q7 excluded & 0.8522 & 0.8504 & 0.8502 & 0.532 \tabularnewline
Q8 excluded & 0.847 & 0.8486 & 0.8515 & 0.5285 \tabularnewline
Q27 excluded & 0.8698 & 0.869 & 0.8711 & 0.5702 \tabularnewline
Q29 excluded & 0.8622 & 0.8608 & 0.8675 & 0.5529 \tabularnewline
Q31 excluded & 0.8476 & 0.8489 & 0.8502 & 0.5292 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=111087&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]Q2 excluded[/C][C]0.8737[/C][C]0.8748[/C][C]0.8763[/C][C]0.5828[/C][/ROW]
[ROW][C]Q7 excluded[/C][C]0.8522[/C][C]0.8504[/C][C]0.8502[/C][C]0.532[/C][/ROW]
[ROW][C]Q8 excluded[/C][C]0.847[/C][C]0.8486[/C][C]0.8515[/C][C]0.5285[/C][/ROW]
[ROW][C]Q27 excluded[/C][C]0.8698[/C][C]0.869[/C][C]0.8711[/C][C]0.5702[/C][/ROW]
[ROW][C]Q29 excluded[/C][C]0.8622[/C][C]0.8608[/C][C]0.8675[/C][C]0.5529[/C][/ROW]
[ROW][C]Q31 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=111087&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=111087&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
Q2 excluded	0.8737	0.8748	0.8763	0.5828
Q7 excluded	0.8522	0.8504	0.8502	0.532
Q8 excluded	0.847	0.8486	0.8515	0.5285
Q27 excluded	0.8698	0.869	0.8711	0.5702
Q29 excluded	0.8622	0.8608	0.8675	0.5529
Q31 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')

Free Statistics

Description of Statistical Computation

Tree of Dependent Computations

Dataset

Tables (Output of Computation)

Figures (Output of Computation)

Input Parameters & R Code