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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 computationTue, 16 Dec 2014 13:20:57 +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/2014/Dec/16/t1418736081lrosu4khc6c4sjy.htm/, Retrieved Thu, 21 May 2026 05:30:27 +0000
Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=269506, Retrieved Thu, 21 May 2026 05:30:27 +0000
QR Codes:

Original text written by user:
IsPrivate?No (this computation is public)
User-defined keywords
Estimated Impact312

Tree of Dependent Computations

Family? (F = Feedback message, R = changed R code, M = changed R Module, P = changed Parameters, D = changed Data)
-       [Cronbach Alpha] [Concern over mist...] [2014-12-16 13:20:57] [ecc8a223a6799628ce1dc096d32923a0] [Current]
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Dataset

Dataseries X:
Download CSV
Histogram
Boxplots 
2 4 1 1 1 1
3 3 4 2 1 2
2 4 4 2 2 2
4 4 4 4 4 2
2 1 2 2 2 3
2 2 2 3 3 3
2 4 4 2 2 3
4 4 4 3 2 3
2 2 2 3 1 3
3 3 2 3 2 2
2 4 1 3 1 3
1 2 1 2 2 2
2 4 2 2 2 2
2 2 1 2 2 2
2 4 4 4 2 2
4 2 1 0 3 2
3 4 4 3 4 3
1 4 2 2 2 2
1 2 3 3 2 4
4 4 3 2 2 3
4 4 3 4 2 1
2 4 2 2 2 1
3 3 2 2 2 2
5 5 3 4 4 3
4 4 4 3 3 3
4 4 4 4 3 3
2 4 2 2 2 2
2 4 2 2 2 2
1 3 2 2 2 1
1 1 1 1 1 1
2 4 2 2 3 2
4 2 4 3 3 1
2 4 2 2 2 2
4 3 1 3 3 2
4 4 4 2 2 2
2 4 2 4 2 2
2 4 1 4 4 3
4 2 2 3 2 3
3 4 2 2 3 3
2 4 3 4 4 3
1 2 1 1 1 2
2 2 2 2 2 4
4 2 3 2 3 3
1 2 1 1 1 2
4 4 2 3 2 2
4 4 2 2 2 2
2 3 2 2 2 2
2 2 1 2 2 2
5 5 5 5 5 5
5 4 2 4 4 3
4 3 1 4 2 3
2 3 2 4 4 2
1 3 1 1 1 1
2 3 3 2 2 2
4 2 2 1 1 3
3 3 4 4 4 4
1 4 1 4 2 4
1 3 1 1 2 2
2 3 2 2 2 2
3 4 2 4 2 2
2 4 2 2 2 2
4 4 3 3 1 2
5 4 3 4 3 5
2 2 1 2 2 2
4 3 2 3 2 2
1 4 1 1 1 2
3 2 2 2 2 2
4 4 4 3 3 2
1 1 2 4 2 1
1 1 1 1 1 1
4 4 4 2 2 2
2 3 2 2 2 2
2 3 2 2 2 2
4 4 3 3 4 4
4 4 1 1 2 2
2 2 2 3 2 1
3 4 4 2 2 1
3 3 3 3 2 2
3 1 2 1 1 2
2 3 1 1 1 1
5 1 1 1 1 1
3 3 3 2 2 2
1 2 2 1 2 3
2 2 3 3 2 2
2 1 1 3 2 2
4 4 4 3 3 3
2 2 2 2 2 2
1 2 2 2 2 2
5 2 3 2 3 2
3 2 2 2 2 2
4 3 3 3 2 2
2 3 2 2 2 2
4 4 2 4 4 4
2 3 2 2 2 2
2 2 2 1 1 2
3 3 2 2 3 3
2 2 2 2 2 2
2 4 1 2 2 3
2 2 2 2 2 2
4 4 1 4 4 3
4 4 3 2 2 4
2 3 3 4 3 4
2 3 2 2 2 2
4 5 2 4 4 4
3 2 2 1 2 1
4 2 3 4 3 1
3 3 3 3 2 1
4 4 3 2 2 3
2 2 1 2 2 2
3 4 3 3 2 3
4 3 4 4 2 2

Tables (Output of Computation)





Summary of computational transaction
Raw Inputview raw input (R code)
Raw Outputview raw output of R engine
Computing time1 seconds
R Server'Sir Ronald Aylmer Fisher' @ fisher.wessa.net

\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' @ fisher.wessa.net \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=269506&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' @ fisher.wessa.net[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=269506&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=269506&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 time1 seconds
R Server'Sir Ronald Aylmer Fisher' @ fisher.wessa.net






Cronbach Alpha and Related Statistics
ItemsCronbach AlphaStd. AlphaG6(smc)Average R
All itmes0.78910.79430.77910.3916
PERF9 excluded0.76840.77190.7460.4037
PERF10 excluded0.76790.77460.75470.4073
PERF13 excluded0.76240.7720.74430.4038
PERF21 excluded0.73830.74380.71310.3673
PERF25 excluded0.73330.73450.69810.3562
PERF34 excluded0.77150.77730.75270.4111

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.7891 & 0.7943 & 0.7791 & 0.3916 \tabularnewline
PERF9 excluded & 0.7684 & 0.7719 & 0.746 & 0.4037 \tabularnewline
PERF10 excluded & 0.7679 & 0.7746 & 0.7547 & 0.4073 \tabularnewline
PERF13 excluded & 0.7624 & 0.772 & 0.7443 & 0.4038 \tabularnewline
PERF21 excluded & 0.7383 & 0.7438 & 0.7131 & 0.3673 \tabularnewline
PERF25 excluded & 0.7333 & 0.7345 & 0.6981 & 0.3562 \tabularnewline
PERF34 excluded & 0.7715 & 0.7773 & 0.7527 & 0.4111 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=269506&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]0.7891[/C][C]0.7943[/C][C]0.7791[/C][C]0.3916[/C][/ROW]
[ROW][C]PERF9 excluded[/C][C]0.7684[/C][C]0.7719[/C][C]0.746[/C][C]0.4037[/C][/ROW]
[ROW][C]PERF10 excluded[/C][C]0.7679[/C][C]0.7746[/C][C]0.7547[/C][C]0.4073[/C][/ROW]
[ROW][C]PERF13 excluded[/C][C]0.7624[/C][C]0.772[/C][C]0.7443[/C][C]0.4038[/C][/ROW]
[ROW][C]PERF21 excluded[/C][C]0.7383[/C][C]0.7438[/C][C]0.7131[/C][C]0.3673[/C][/ROW]
[ROW][C]PERF25 excluded[/C][C]0.7333[/C][C]0.7345[/C][C]0.6981[/C][C]0.3562[/C][/ROW]
[ROW][C]PERF34 excluded[/C][C]0.7715[/C][C]0.7773[/C][C]0.7527[/C][C]0.4111[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=269506&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=269506&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 itmes0.78910.79430.77910.3916
PERF9 excluded0.76840.77190.7460.4037
PERF10 excluded0.76790.77460.75470.4073
PERF13 excluded0.76240.7720.74430.4038
PERF21 excluded0.73830.74380.71310.3673
PERF25 excluded0.73330.73450.69810.3562
PERF34 excluded0.77150.77730.75270.4111


Figures (Output of Computation)

Input Parameters & R Code

Parameters (Session):
par1 = TRUE ;
Parameters (R input):
par1 = TRUE ;
R code (references can be found in the software module):
library(psych)
par1b <- T
if(par1=='FALSE') par1b <- F
z <- t(y)
(r <- alpha(z,check.keys=par1b))
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')