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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

Sun, 13 May 2012 11:07:32 -0400

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/2012/May/13/t1336922141b2wnxv5g7wk4n90.htm/, Retrieved Fri, 03 May 2024 17:09:01 +0000

Statistical Computations at FreeStatistics.org, Office for Research Development and Education, URL https://freestatistics.org/blog/index.php?pk=166431, Retrieved Fri, 03 May 2024 17:09:01 +0000

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Original text written by user:

IsPrivate?

No (this computation is public)

User-defined keywords

Estimated Impact

207

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

-       [Cronbach Alpha] [LEARNER PREFERENC...] [2012-05-13 15:07:32] [d41d8cd98f00b204e9800998ecf8427e] [Current]

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Dataseries X:

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Histogram

Boxplots

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

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	'AstonUniversity' @ aston.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 & 'AstonUniversity' @ aston.wessa.net \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=166431&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]'AstonUniversity' @ aston.wessa.net[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=166431&T=0

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=166431&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	'AstonUniversity' @ aston.wessa.net

Cronbach Alpha and Related Statistics
Items	Cronbach Alpha	Std. Alpha	G6(smc)	Average R
All itmes	0.8113	0.8101	0.8533	0.2991
Q1 excluded	0.7719	0.7737	0.8225	0.2753
Q2 excluded	0.7992	0.7952	0.827	0.3014
Q3 excluded	0.7976	0.7989	0.8369	0.3062
Q4 excluded	0.8074	0.8091	0.85	0.3202
Q5 excluded	0.7908	0.7891	0.8332	0.2936
Q6 excluded	0.8084	0.8051	0.8404	0.3146
Q7 excluded	0.7875	0.785	0.8304	0.2886
Q8 excluded	0.8075	0.8069	0.8499	0.3171
Q9 excluded	0.7781	0.7777	0.8225	0.2799
Q10 excluded	0.7926	0.7893	0.8273	0.2938

\begin{tabular}{lllllllll}
\hline
Cronbach Alpha and Related Statistics \tabularnewline
Items & Cronbach Alpha & Std. Alpha & G6(smc) & Average R \tabularnewline
All itmes & 0.8113 & 0.8101 & 0.8533 & 0.2991 \tabularnewline
Q1 excluded & 0.7719 & 0.7737 & 0.8225 & 0.2753 \tabularnewline
Q2 excluded & 0.7992 & 0.7952 & 0.827 & 0.3014 \tabularnewline
Q3 excluded & 0.7976 & 0.7989 & 0.8369 & 0.3062 \tabularnewline
Q4 excluded & 0.8074 & 0.8091 & 0.85 & 0.3202 \tabularnewline
Q5 excluded & 0.7908 & 0.7891 & 0.8332 & 0.2936 \tabularnewline
Q6 excluded & 0.8084 & 0.8051 & 0.8404 & 0.3146 \tabularnewline
Q7 excluded & 0.7875 & 0.785 & 0.8304 & 0.2886 \tabularnewline
Q8 excluded & 0.8075 & 0.8069 & 0.8499 & 0.3171 \tabularnewline
Q9 excluded & 0.7781 & 0.7777 & 0.8225 & 0.2799 \tabularnewline
Q10 excluded & 0.7926 & 0.7893 & 0.8273 & 0.2938 \tabularnewline
\hline
\end{tabular}
%Source: https://freestatistics.org/blog/index.php?pk=166431&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]0.8113[/C][C]0.8101[/C][C]0.8533[/C][C]0.2991[/C][/ROW]
[ROW][C]Q1 excluded[/C][C]0.7719[/C][C]0.7737[/C][C]0.8225[/C][C]0.2753[/C][/ROW]
[ROW][C]Q2 excluded[/C][C]0.7992[/C][C]0.7952[/C][C]0.827[/C][C]0.3014[/C][/ROW]
[ROW][C]Q3 excluded[/C][C]0.7976[/C][C]0.7989[/C][C]0.8369[/C][C]0.3062[/C][/ROW]
[ROW][C]Q4 excluded[/C][C]0.8074[/C][C]0.8091[/C][C]0.85[/C][C]0.3202[/C][/ROW]
[ROW][C]Q5 excluded[/C][C]0.7908[/C][C]0.7891[/C][C]0.8332[/C][C]0.2936[/C][/ROW]
[ROW][C]Q6 excluded[/C][C]0.8084[/C][C]0.8051[/C][C]0.8404[/C][C]0.3146[/C][/ROW]
[ROW][C]Q7 excluded[/C][C]0.7875[/C][C]0.785[/C][C]0.8304[/C][C]0.2886[/C][/ROW]
[ROW][C]Q8 excluded[/C][C]0.8075[/C][C]0.8069[/C][C]0.8499[/C][C]0.3171[/C][/ROW]
[ROW][C]Q9 excluded[/C][C]0.7781[/C][C]0.7777[/C][C]0.8225[/C][C]0.2799[/C][/ROW]
[ROW][C]Q10 excluded[/C][C]0.7926[/C][C]0.7893[/C][C]0.8273[/C][C]0.2938[/C][/ROW]
[/TABLE]
Source: https://freestatistics.org/blog/index.php?pk=166431&T=1

Globally Unique Identifier (entire table): ba.freestatistics.org/blog/index.php?pk=166431&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	0.8113	0.8101	0.8533	0.2991
Q1 excluded	0.7719	0.7737	0.8225	0.2753
Q2 excluded	0.7992	0.7952	0.827	0.3014
Q3 excluded	0.7976	0.7989	0.8369	0.3062
Q4 excluded	0.8074	0.8091	0.85	0.3202
Q5 excluded	0.7908	0.7891	0.8332	0.2936
Q6 excluded	0.8084	0.8051	0.8404	0.3146
Q7 excluded	0.7875	0.785	0.8304	0.2886
Q8 excluded	0.8075	0.8069	0.8499	0.3171
Q9 excluded	0.7781	0.7777	0.8225	0.2799
Q10 excluded	0.7926	0.7893	0.8273	0.2938

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')

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Tree of Dependent Computations

Dataset

Tables (Output of Computation)

Figures (Output of Computation)

Input Parameters & R Code