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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

Thu, 16 Dec 2010 16:28:52 +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/t129251682449snrsf6hnfq2rz.htm/, Retrieved Wed, 19 Nov 2025 08:24:14 +0000

Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=111079, Retrieved Wed, 19 Nov 2025 08:24:14 +0000

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Original text written by user:

IsPrivate?

No (this computation is public)

User-defined keywords

Estimated Impact

432

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 16:28:52] [93ab421e12cd1017d2b38fdbcbdb62e0] [Current]

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Dataseries X:

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Histogram

Boxplots

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

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	'Sir Ronald Aylmer Fisher' @ 193.190.124.24

\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 & 'Sir Ronald Aylmer Fisher' @ 193.190.124.24 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=111079&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]'Sir Ronald Aylmer Fisher' @ 193.190.124.24[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=111079&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=111079&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	'Sir Ronald Aylmer Fisher' @ 193.190.124.24

Cronbach Alpha and Related Statistics
Items	Cronbach Alpha	Std. Alpha	G6(smc)	Average R
All itmes	0.7793	0.7772	0.7758	0.3325
Q4 excluded	0.7907	0.7859	0.7743	0.3795
Q6 excluded	0.7542	0.7506	0.7464	0.334
Q12 excluded	0.7181	0.7173	0.7036	0.2972
Q16 excluded	0.7824	0.7843	0.7734	0.3774
Q19 excluded	0.7273	0.7263	0.7191	0.3067
Q24 excluded	0.7531	0.75	0.7444	0.3333
Q30 excluded	0.7222	0.7196	0.7112	0.2996

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.7793 & 0.7772 & 0.7758 & 0.3325 \tabularnewline
Q4 excluded & 0.7907 & 0.7859 & 0.7743 & 0.3795 \tabularnewline
Q6 excluded & 0.7542 & 0.7506 & 0.7464 & 0.334 \tabularnewline
Q12 excluded & 0.7181 & 0.7173 & 0.7036 & 0.2972 \tabularnewline
Q16 excluded & 0.7824 & 0.7843 & 0.7734 & 0.3774 \tabularnewline
Q19 excluded & 0.7273 & 0.7263 & 0.7191 & 0.3067 \tabularnewline
Q24 excluded & 0.7531 & 0.75 & 0.7444 & 0.3333 \tabularnewline
Q30 excluded & 0.7222 & 0.7196 & 0.7112 & 0.2996 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=111079&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]0.7793[/C][C]0.7772[/C][C]0.7758[/C][C]0.3325[/C][/ROW]
[ROW][C]Q4 excluded[/C][C]0.7907[/C][C]0.7859[/C][C]0.7743[/C][C]0.3795[/C][/ROW]
[ROW][C]Q6 excluded[/C][C]0.7542[/C][C]0.7506[/C][C]0.7464[/C][C]0.334[/C][/ROW]
[ROW][C]Q12 excluded[/C][C]0.7181[/C][C]0.7173[/C][C]0.7036[/C][C]0.2972[/C][/ROW]
[ROW][C]Q16 excluded[/C][C]0.7824[/C][C]0.7843[/C][C]0.7734[/C][C]0.3774[/C][/ROW]
[ROW][C]Q19 excluded[/C][C]0.7273[/C][C]0.7263[/C][C]0.7191[/C][C]0.3067[/C][/ROW]
[ROW][C]Q24 excluded[/C][C]0.7531[/C][C]0.75[/C][C]0.7444[/C][C]0.3333[/C][/ROW]
[ROW][C]Q30 excluded[/C][C]0.7222[/C][C]0.7196[/C][C]0.7112[/C][C]0.2996[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=111079&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=111079&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	0.7793	0.7772	0.7758	0.3325
Q4 excluded	0.7907	0.7859	0.7743	0.3795
Q6 excluded	0.7542	0.7506	0.7464	0.334
Q12 excluded	0.7181	0.7173	0.7036	0.2972
Q16 excluded	0.7824	0.7843	0.7734	0.3774
Q19 excluded	0.7273	0.7263	0.7191	0.3067
Q24 excluded	0.7531	0.75	0.7444	0.3333
Q30 excluded	0.7222	0.7196	0.7112	0.2996

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