FreeStatistics.org

Free Statistics

of Irreproducible Research!

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 computationSun, 12 Dec 2010 15:33:24 +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/2010/Dec/12/t1292167981kdmsh8olbcw8004.htm/, Retrieved Wed, 19 Nov 2025 08:22:44 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=108524, Retrieved Wed, 19 Nov 2025 08:22:44 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact455

Tree of Dependent Computations

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] [93ab421e12cd1017d2b38fdbcbdb62e0] [Current]
-    D        [Cronbach Alpha] [Cronbach Alpha - ...] [2010-12-16 16:28:52] [3cdf9c5e1f396891d2638627ccb7b98d]
-    D        [Cronbach Alpha] [Cronbach Alpha - ...] [2010-12-16 16:38:21] [74be16979710d4c4e7c6647856088456]
-    D        [Cronbach Alpha] [Cronbach Alpha - ...] [2010-12-16 16:38:21] [3cdf9c5e1f396891d2638627ccb7b98d]
Feedback Forum

Post a new message

Dataset

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

Tables (Output of Computation)





Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time9 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 & 9 seconds \tabularnewline
R Server & 'Sir Ronald Aylmer Fisher' @ 193.190.124.24 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=108524&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]9 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=108524&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=108524&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 time9 seconds
R Server'Sir Ronald Aylmer Fisher' @ 193.190.124.24






Cronbach Alpha and Related Statistics
ItemsCronbach AlphaStd. AlphaG6(smc)Average R
All itmes0.73860.73980.7070.4155
Q3 excluded0.66750.67010.61170.4037
Q5 excluded0.74460.74640.67210.4952
Q22 excluded0.63980.63870.56240.3708
Q35 excluded0.65860.65940.56380.3922

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.7386 & 0.7398 & 0.707 & 0.4155 \tabularnewline
Q3 excluded & 0.6675 & 0.6701 & 0.6117 & 0.4037 \tabularnewline
Q5 excluded & 0.7446 & 0.7464 & 0.6721 & 0.4952 \tabularnewline
Q22 excluded & 0.6398 & 0.6387 & 0.5624 & 0.3708 \tabularnewline
Q35 excluded & 0.6586 & 0.6594 & 0.5638 & 0.3922 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=108524&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]0.7386[/C][C]0.7398[/C][C]0.707[/C][C]0.4155[/C][/ROW]
[ROW][C]Q3 excluded[/C][C]0.6675[/C][C]0.6701[/C][C]0.6117[/C][C]0.4037[/C][/ROW]
[ROW][C]Q5 excluded[/C][C]0.7446[/C][C]0.7464[/C][C]0.6721[/C][C]0.4952[/C][/ROW]
[ROW][C]Q22 excluded[/C][C]0.6398[/C][C]0.6387[/C][C]0.5624[/C][C]0.3708[/C][/ROW]
[ROW][C]Q35 excluded[/C][C]0.6586[/C][C]0.6594[/C][C]0.5638[/C][C]0.3922[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=108524&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=108524&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 itmes0.73860.73980.7070.4155
Q3 excluded0.66750.67010.61170.4037
Q5 excluded0.74460.74640.67210.4952
Q22 excluded0.63980.63870.56240.3708
Q35 excluded0.65860.65940.56380.3922


Figures (Output of Computation)

Input Parameters & R Code

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')