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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 computationSun, 12 Dec 2010 15:22:42 +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/t1292167271k4rj5x3gdu95pw6.htm/, Retrieved Wed, 23 Apr 2025 01:01:30 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=108513, Retrieved Wed, 23 Apr 2025 01:01:30 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact246

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 15:22:42] [93ab421e12cd1017d2b38fdbcbdb62e0] [Current]
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Dataset

Dataseries X:
Download CSV
Histogram
Boxplots 
2	4	1	2	2
2	1	1	1	2
4	5	2	4	2
2	3	1	2	2
3	3	2	2	2
4	3	1	2	2
3	2	3	2	1
3	3	1	2	2
3	4	1	1	3
2	4	1	4	2
4	4	2	2	2
4	2	4	3	3
3	2	2	2	2
3	2	1	2	2
4	4	1	1	1
4	4	3	3	1
3	3	2	1	
3	2	2	2	2
3	5	3	4	2
4	4	3	4	2
2	3	1	3	2
5	4	2	2	5
4	3	2	3	2
2	2	2	2	2
3	2	2	2	2
4	3	3	3	2
4	4	2	3	2
3	4	2	2	2
4	5	2	4	1
4	4	2	2	1
1	3	2	2	1
4	4	3	3	4
5	4	2	5	2
2	4	2	2	2
4	5	2	3	3
3	2	2	1	1
2	2	2	2	1
4	4	1	2	1
5	5	2	4	2
4	3	1	2	2
4	5	2	4	3
4	2	2	3	3
3	4	2	2	4
4	4	2	4	2
2	2	2	2	2
2	2	3	2	2
4	4	2	2	2
2	2	2	2	1
4	2	2	2	2
4	4	4	3	2
1	1	1	1	1
4	2	2	2	2
2	4	2	2	2
1	1	1	1	2
4	5	5	5	5
3	4	2	2	1
2	4	2	2	2
4	4	2	2	2
3	1	1	1	1
2	4	2	2	3
2	4	2	2	2
3	4	2	2	2
2	4	2	4	2
1	2	2	2	1
3	4	1	1	2
2	3	1	2	1
3	2	2	2	2
3	4	2	2	2
3	4	1	1	1
2	3	2	2	2
3	3	2	2	2
2	2	1	2	2
4	4	3	3	1
4	4	3	3	4
4	4	3	2	2
2	4	2	2	2
3	4	2	3	1
4	4	2	2	2
3	2	1	2	2
4	2	4	2	1
2	4	3	2	2
3	2	2	2	2
3	4	2	1	3
4	5	2	3	2
2	2	1	2	1
4	4	2	4	2
2	2	3	2	2
2	4	1	1	1
4	4	2	4	2
3	2	2	3	2
4	4	2	2	2
2	1	1	3	1
2	2	1	2	2
3	5	2	3	2
3	2	2	2	2
5	5	4	5	2
2	4	2	3	3
3	4	4	4	3
4	2	1	2	3
3	2	3	2	3
4	4	2	2	3
3	2	2	3	2
3	4	4	4	4
2	4	3	3	3
3	2	2	2	2
2	4	1	2	2
3	2	1	3	1
2	4	2	2	3
4	4	3	2	2
2	4	2	2	2
4	3	1	2	2
4	3	2	3	4
1	2	2	2	2
5	5	2	4	2
2	3	1	1	1
3	4	2	2	2
4	3	3	4	3
1	2	2	2	2
5	4	2	2	2
3	2	1	1	1
3	1	1	1	1
3	2	2	3	2
3	4	2	3	2
2	1	1	1	1
2	1	2	1	2
4	4	3	3	3
4	3	1	1	1
3	2	2	2	2
3	3	2	3	3
3	2	2	2	2
4	3	2	2	2
3	4	2	2	1
4	2	1	2	2
4	1	1	2	1
2	4	2	2	2
4	4	4	4	4
2	4	2	2	2
4	3	2	2	2
3	2	2	3	2
3	2	2	2	3
2	2	2	2	1
2	5	2	4	2
5	5	5	4	5
2	2	1	1	1
4	3	4	3	3
3	2	2	2	2
3	4	3	4	3
3	2	2	2	2
3	2	2	1	4
4	4	2	2	2
4	2	1	2	2
4	5	2	3	2
4	5	5	5	2
4	4	2	2	2
5	4	3	4	4
3	4	2	2	2
3	2	2	2	2
4	4	2	3	2
4	3	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 time2 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=108513&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=108513&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=108513&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 time2 seconds
R Server'Gwilym Jenkins' @ 72.249.127.135






Cronbach Alpha and Related Statistics
ItemsCronbach AlphaStd. AlphaG6(smc)Average R
All itmes0.55430.5640.59670.2055
Q1 excluded0.39830.42470.46920.1558
Q11 excluded0.46590.47120.47310.1822
Q15 excluded0.37280.39110.43560.1383
Q20 excluded0.42360.42130.46810.154
Q26 excluded0.72150.72510.67880.3973

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.5543 & 0.564 & 0.5967 & 0.2055 \tabularnewline
Q1 excluded & 0.3983 & 0.4247 & 0.4692 & 0.1558 \tabularnewline
Q11 excluded & 0.4659 & 0.4712 & 0.4731 & 0.1822 \tabularnewline
Q15 excluded & 0.3728 & 0.3911 & 0.4356 & 0.1383 \tabularnewline
Q20 excluded & 0.4236 & 0.4213 & 0.4681 & 0.154 \tabularnewline
Q26 excluded & 0.7215 & 0.7251 & 0.6788 & 0.3973 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=108513&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]0.5543[/C][C]0.564[/C][C]0.5967[/C][C]0.2055[/C][/ROW]
[ROW][C]Q1 excluded[/C][C]0.3983[/C][C]0.4247[/C][C]0.4692[/C][C]0.1558[/C][/ROW]
[ROW][C]Q11 excluded[/C][C]0.4659[/C][C]0.4712[/C][C]0.4731[/C][C]0.1822[/C][/ROW]
[ROW][C]Q15 excluded[/C][C]0.3728[/C][C]0.3911[/C][C]0.4356[/C][C]0.1383[/C][/ROW]
[ROW][C]Q20 excluded[/C][C]0.4236[/C][C]0.4213[/C][C]0.4681[/C][C]0.154[/C][/ROW]
[ROW][C]Q26 excluded[/C][C]0.7215[/C][C]0.7251[/C][C]0.6788[/C][C]0.3973[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=108513&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=108513&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 itmes0.55430.5640.59670.2055
Q1 excluded0.39830.42470.46920.1558
Q11 excluded0.46590.47120.47310.1822
Q15 excluded0.37280.39110.43560.1383
Q20 excluded0.42360.42130.46810.154
Q26 excluded0.72150.72510.67880.3973


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')